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Intergenerational equity

Intergenerational equity is the ethical and economic principle asserting that present generations bear a to steward shared resources, liabilities, and environmental conditions in a manner that preserves comparable opportunities and for , without systematically depleting stocks or externalizing costs across time. Originating in philosophical discourse on and formalized in fields like and , the concept challenges policies that accumulate unsustainable or degrade , as exemplified by rising indebtedness in advanced economies, which some analyses frame as a potential transfer of burdens via taxation or to unborn cohorts. In macroeconomic models of overlapping generations, equity considerations highlight trade-offs between and , where -financed investments in or may enhance rather than erode intergenerational fairness if rates exceed rates, though empirical thresholds for sustainability remain debated amid varying fiscal trajectories. Environmentally, the principle drives imperatives, urging conservation of ecosystems and mitigation of pollution to avert long-term harms like , yet critiques note that projections of irreversible damage often rely on models prone to uncertainty, potentially justifying interventions that prioritize speculative risks over verifiable present gains in adaptive technologies and living standards. Controversies persist over measurement and enforcement, including challenges in discounting utilities, representing non-existent generations, and distinguishing genuine inequities from politically motivated invocations that overlook historical precedents of resolving , as seen in panics averted by and advances.

Conceptual Foundations

Definition and Core Principles

Intergenerational equity denotes the principle whereby current generations bear a responsibility to maintain or enhance the aggregate stock of productive resources—encompassing , , and natural resources—for the benefit of , thereby avoiding the imposition of undue burdens through unsustainable or depletion. This framework prioritizes the conservation of opportunities rather than mandating identical outcomes, recognizing that substitutions between capital types, such as converting natural resources into reproducible capital via , can sustain or improve across time. Central to this is the avoidance of zero-sum transfers, exemplified by unfunded liabilities that transfer fiscal burdens forward without corresponding productive gains, in contrast to investments that yield compounding returns. Core tenets include the imperative to reinvest rents from exhaustible resources into durable to preserve potential, as articulated in economic models emphasizing intergenerational fairness through sustained paths. This approach underscores causal mechanisms wherein technological advancement and adaptive innovation enable future cohorts to surpass predecessors' achievements, rather than presuming static endowments. Empirical evidence supports this dynamic: global has more than doubled from approximately 32 years in 1900 to over 71 years by 2021, reflecting net enhancements in health and living standards bequeathed by prior eras. Likewise, has receded dramatically, with the share of the world population below $2.15 daily falling from nearly 40% in 1990 to around 9% by recent estimates, propelled by and that have elevated opportunities without exhausting resources. These trends illustrate how preservation-oriented decisions foster rising trajectories, countering narratives of inherent intergenerational predation.

Philosophical Underpinnings

argued in his Second Treatise of Government () that parental labor creates property rights that extend to children, conferring a "Title to their Father's Estate for their Subsistence" to ensure their support and , thereby establishing a basis for obligations to posterity grounded in natural rights rather than collective equity. This view frames intergenerational duties as extensions of individual property acquisition through labor, limited by the against spoilage or sufficient resources left for others, but without mandating equal shares across distant generations. John Rawls extended his veil of ignorance in (1971) to intergenerational contexts via the "just savings principle," positing that rational agents behind the veil would agree to save enough for future generations to maintain a just basic structure of society, prioritizing the least advantaged across time without knowing one's generational position. This contractualist approach treats current generations as trustees obligated to preserve institutional fairness for successors, though Rawls limited savings to moderate levels sufficient for societal continuity rather than maximal equity. Utilitarian critiques, notably Derek Parfit's non-identity problem in (1984), challenge person-affecting -based duties to future generations, arguing that actions like may not harm specific individuals who would not otherwise exist in their particular form, thus undermining claims of interpersonal across time. Parfit contended that such policies could worsen lives for no one identifiable, shifting focus from to impartial maximization, yet this reveals tensions in aggregating utilities over non-overlapping lives where causation determines who exists. Debates over highlight ' lack of political agency, such as or , rendering strong claims vulnerable to exploitation by present actors who bear immediate costs without reciprocal . Counterarguments invoke a trusteeship model, where the living hold resources in for verifiable successor interests, akin to duties, but confine obligations to tangible impairments like unmanageable burdens rather than hypothetical deprivations from . From first-principles reasoning, absolute intergenerational equity overlooks time discounting rooted in human , where present needs warrant higher valuation due to and opportunity costs, as philosophical analyses of social discount rates emphasize basing rates on empirical individual preferences or productivity growth rather than pure . Causal further critiques undifferentiated "" for the unborn, as historical resource scarcity has yielded to innovation-driven abundance, suggesting that restrictions justified by speculative parity often lack evidence of net intergenerational benefit and ignore adaptive .

Historical Development

Early Philosophical Roots

In , Aristotle's discussions of within the () provided early foundations for notions of across familial generations, which could be extended metaphorically to societal legacies. In and , he emphasized according to merit and the proper management of resources in the household economy, where the father's role ensured the continuity of the family's holdings for heirs, implying a to avoid dissipation that burdens successors. This framework prioritized balanced allocation to maintain household viability, influencing later ideas of equitable transmission of wealth and land. Roman law introduced more explicit mechanisms for intergenerational transfers through the , a testamentary obligating heirs to preserve and pass assets to subsequent beneficiaries. Originating as an informal request enforceable by , it evolved under emperors like into a binding by the early , allowing testators to impose conditions preventing the of family estates. This device safeguarded patrimony against profligate heirs, reflecting a causal recognition that unchecked consumption depletes resources available to posterity, with enforcement tied to the heir's (fides). During the , John Locke's in the Second Treatise of Government (1689) incorporated a proviso against , prohibiting appropriations that spoil resources or leave future generations worse off. He argued that individuals may not claim more than they can use before it perishes, as "nothing was made by for man to spoil or destroy," thereby embedding a principle of in natural rights discourse. This Lockean limit, grounded in empirical observation of perishability, aimed to preserve "enough and as good" for others, including unborn heirs, countering enclosures that degrade common stocks. Adam Smith, in The Wealth of Nations (1776), advanced this legacy through the "invisible hand" metaphor, positing that self-interested pursuits in free markets foster capital accumulation and innovation, yielding greater long-term prosperity for posterity than static preservation. By channeling savings into productive investments rather than hoarding, economic agents unintentionally enhance societal wealth, as division of labor and trade expand output beyond mere subsistence. Smith's analysis implied that growth-oriented systems, unlike zero-sum stasis, multiply resources available to future generations via compounded productivity. The 19th-century transition saw Thomas Malthus's An Essay on the Principle of Population (1798) warn of exponential population growth outstripping linear food supplies, predicting recurrent famines unless checked by vice, misery, or moral restraint. However, these projections were empirically falsified by the demographic transition starting in the late 19th century, where fertility declines and technological advances—such as mechanized agriculture and synthetic fertilizers—sustained rising living standards without the anticipated collapses, demonstrating that human ingenuity alters causal resource constraints.

Modern Economic and Policy Emergence

The formalization of intergenerational equity in modern economics emerged prominently in the 1970s, integrating concerns about and preservation into neoclassical models. Robert Solow's 1974 analysis emphasized maintaining a sustainable stock—encompassing produced , natural resources, and labor—to prevent diminishment of ' productive capacity, arguing that optimal economic paths should sustain consumption levels even with exhaustible resources. This approach shifted from purely descriptive to prescriptive standards, prioritizing investments that compensate for resource drawdowns through reproducible assets. Complementing Solow, John Hartwick's 1977 rule stipulated that all rents from extraction be reinvested in to achieve constant utility across generations, providing a concrete mechanism for fiscal prudence in resource-dependent economies. These economic insights influenced policy frameworks, particularly in fiscal systems like the U.S. Social Security program, enacted via the 1935 as a pay-as-you-go mechanism where current workers' contributions fund retirees' benefits, predicated on an implicit intergenerational compact of reciprocal support. By the late , demographic aging and expanding entitlements strained this structure, prompting debates on equity as actuarial imbalances threatened higher burdens on younger cohorts without corresponding benefits. The 1987 Brundtland Report, "," advanced "" as meeting present needs without compromising future generations' abilities, but economists critiqued its emphasis on stock constancy for potentially conflating equity with economic stasis, overlooking substitutability via technological progress and . Empirical evidence from post-World War II economic expansions underscored a to depletion narratives, as sustained growth in and elevated living standards for subsequent generations. In the United States, real GDP per capita rose from approximately $15,700 in to $47,300 by 2000 (in chained 2017 dollars), driven by and capital deepening, thereby enhancing rather than eroding future wealth. This dynamic outcome challenged prescriptive models overly focused on static preservation, highlighting how growth-oriented policies could fulfill through expanded rather than mere .

Post-2000 Global Initiatives

The United Nations (MDGs), adopted in 2000, prioritized alleviating extreme poverty, hunger, and disease in the present generation through targets like halving poverty rates by 2015, but placed limited emphasis on environmental protection or explicit safeguards for future generations' resource access. This approach shifted with the (SDGs) in 2015, which integrated intergenerational equity into Agenda 2030, linking it to goals such as poverty eradication (SDG 1), reduced inequalities (SDG 10), and sustainable institutions (SDG 16), while urging conservation of for posterity under principles from the 1992 Rio Declaration. The 2012 Rio+20 conference further reinforced these commitments by promoting transitions and institutional reforms, though empirical reviews indicate uneven implementation, with high compliance costs in developing nations often exceeding measurable long-term benefits in resource preservation or equity metrics. In , the initiated consultations for an Intergenerational Fairness Strategy in February 2025, aiming to empower current and through tools like a proposed Intergenerational Fairness Index to measure disparities in opportunities across age cohorts, with formal adoption targeted for 2026. Complementing this, youth-led efforts such as the Youth Moving Beyond GDP Initiative, launched in 2025 under UNCTAD auspices, advocate redefining progress metrics beyond GDP to prioritize intergenerational equity, emphasizing redirection toward sustainable investments and in policymaking. Empirical assessments reveal shortcomings in these initiatives' effectiveness, including inflation's role in eroding intergenerational endowments—such as funds preserving real value post-inflation—which undermines bequeathed capital despite nominal policy goals, as documented in 2025 analyses showing corrosive impacts on long-term . Implementation of Rio+20 pledges, for instance, has yielded disproportionate costs relative to verified gains, with institutional biases in UN and academic reporting often amplifying alarmist narratives over data-driven outcomes. Recent 2024-2025 data further indicate that sustained , rather than redistribution-focused solidarity amid political shifts, correlates more strongly with improved intergenerational , as evidenced by positive links between GDP and income persistence across generations in global datasets.

Economic Dimensions

Public Debt and Fiscal Responsibility

Public debt accumulation by governments constitutes a transfer of fiscal burdens to , as current deficits are financed through borrowing that future taxpayers must repay via higher taxes, reduced services, or inflationary policies. This mechanism operates on the principle that sovereign represents deferred claims on national income, with interest payments alone projected to exceed defense spending in many advanced economies by the mid-2020s. In the United States, held by the reached approximately 99% of GDP in 2024, with gross debt exceeding 124% when including intragovernmental holdings, signaling escalating obligations for subsequent cohorts. High levels of public debt empirically correlate with reduced , primarily through crowding out of private investment as government borrowing competes for savings and elevates real interest rates. Research indicates that debt-to-GDP ratios above 90% are associated with significantly lower GDP rates—median annual falls to about 1.6% compared to over 3% for ratios below the —though methodological critiques, such as selective exclusions and errors in seminal studies, have prompted ; nonetheless, broader empirical reviews affirm a negative directional impact even after for and reverse causality. Cross-country analyses further demonstrate that rising public debt reduces private firms' investment by limiting credit access and increasing borrowing costs, with firm-level surveys showing inverse correlations between debt burdens and capital expenditures. Persistent deficits reflect political incentives favoring immediate spending over long-term fiscal restraint, contrasting with historical norms of budgetary balance in the U.S. prior to the , when surpluses occurred in 69 of 100 years during the and balanced budgets were achieved as recently as 1969. Post-, structural deficits became entrenched, accelerating after the —with annual shortfalls exceeding $1 trillion—and surging to $3.1 trillion in fiscal year 2020 amid responses, adding trillions to the debt stock. These patterns burden younger generations with servicing costs that divert resources from productive investments, potentially perpetuating lower growth trajectories and challenging claims of sustainable debt paths amid aging demographics and entitlement pressures.

Entitlement Programs and Wealth Transfers

Entitlement programs, particularly pay-as-you-go (PAYG) systems, exemplify intergenerational wealth transfers that impose fiscal burdens on younger cohorts to finance benefits for current retirees, often critiqued as reversing traditional equity principles by prioritizing the present over the future. , , enacted via the of 1935, operates as a mandatory intergenerational rather than a genuine or savings mechanism, with payroll taxes from current workers directly funding benefits for retirees, survivors, and disabled individuals. This structure has led to a declining worker-to-beneficiary ratio, dropping from approximately 5:1 in 1960 to 2.8:1 in recent years, with projections indicating further strain as demographic shifts reduce the contributor base relative to recipients. European Union nations exhibit parallel dynamics in their PAYG pension frameworks, where aging populations exacerbate dependency ratios—the ratio of individuals aged 65 and older to the working-age population (20-64)—projected to rise from 31% across OECD countries in 2023 to 52% by 2060, approaching or exceeding 1:1 worker-to-retiree balances in high-aging states like Italy and Germany by mid-century. These systems' unsustainability stems from unfunded liabilities, with U.S. Social Security and Medicare facing combined 75-year shortfalls estimated in the tens of trillions of dollars in present value terms, compelling future tax hikes or benefit cuts that diminish younger generations' disposable income and savings capacity. Critics highlight Ponzi-like elements in PAYG designs, where sustainability hinges on perpetual influxes of younger workers outpacing retirees, a dynamic upended by falling birth rates and gains, resulting in implicit debts transferred forward without corresponding asset accumulation. Reforms shifting to funded accounts, as in Chile's 1981 privatization of its —which replaced a bankrupt PAYG model with mandatory private contributions yielding average real returns of over 8% through —demonstrate viable alternatives, fostering higher national savings rates and while debunking notions of immutable "social contracts" insulated from demographic realities. Such evidence underscores how PAYG transfers erode productive investments for youth, amplifying inequities as dependency burdens intensify without structural adjustments.

Investment in Productive Capital

Investment in productive , encompassing physical assets like machinery and as well as intangible investments in (R&D), underpins sustainable economic expansion that enhances and bequeaths greater wealth to subsequent generations. Unlike policies emphasizing immediate , such investments generate positive-sum outcomes by amplifying output potential over time, enabling higher living standards without depleting resources. In neoclassical frameworks, capital deepening raises marginal , fostering that compounds across generations through reinvested returns. The Solow-Swan growth model formalizes this dynamic, positing that an economy's steady-state output per worker depends on the savings rate, which determines ; higher rates elevate the capital-labor ratio, yielding elevated levels that persist into the future absent exogenous technological shifts. Empirical validation appears in the East Asian "miracle" economies, where private investment rates averaged over 30% of GDP from the 1980s onward—far exceeding global norms—driving annual GDP per capita growth rates of 6-8% in nations like and , which in turn correlated with elevated intergenerational income as expanded opportunities reduced reliance on inherited wealth. These outcomes stemmed from export-oriented strategies channeling savings into productive sectors, contrasting with lower-investment regions where priorities yielded stagnant . Regulatory burdens pose significant obstacles to such accumulation by escalating R&D costs and distorting incentives; a comprehensive analysis equates stringent regulations to a 2.5% profit tax, curtailing aggregate by roughly 5.4% through overheads that divert funds from experimentation. In 2025, inflationary pressures—compounded by elevated energy and costs—further erode real returns on , with U.S. endowments like Yale's requiring 3% annual set-asides from gains merely to maintain , thereby constraining reinvestment in growth-oriented assets amid nominal returns averaging 6-12%. Advocates of approaches contend that unfettered markets optimize compounding by directing toward high-yield innovations, whereas state-directed reallocations toward present entitlements often crowd out private savings and perpetuate lower long-term trajectories, as evidenced by comparative growth divergences between intervention-heavy and market-liberal economies.

Environmental Dimensions

Sustainability Concepts and Critiques

Weak sustainability maintains that intergenerational equity requires preserving the total value of stocks across , , manufactured, and social forms, permitting substitution of depleted natural resources with technological innovations or to sustain equivalent productive capacity. In contrast, strong insists on non-substitutability for critical , such as or services deemed essential for human welfare, advocating preservation of these assets at baseline levels regardless of compensatory advancements elsewhere. Critics of strong sustainability argue it underestimates human ingenuity's capacity for resource substitution, echoing Luddite resistance to progress by assuming static technological limits rather than dynamic adaptation. Historical precedents illustrate this substitutability: in the mid-19th century, derived from displaced for lighting, reducing whaling pressure as global production rose from negligible levels in 1850 to over 1 million barrels annually by 1870, thereby averting predicted whale stock collapse without halting energy demand growth. Empirical evidence challenges scarcity narratives underpinning strong sustainability. The 1980 Simon-Ehrlich wager tested predictions of resource exhaustion: economist bet against biologist Paul Ehrlich's claim of rising prices for five metals (copper, , , tin, ) over a due to pressures; by 1990, inflation-adjusted prices had fallen by 57.6%, yielding Simon a $576 payment and validating abundance through innovation over Malthusian depletion. Long-term commodity trends reinforce this, with real prices of key resources declining amid tripling since 1950, as technological efficiencies outpaced extraction needs. As of 2025, the forecasts a 12% drop in overall commodity prices, driven by supply expansions and subdued demand, continuing a pattern where innovation has historically lowered costs despite rising consumption. Advocacy for strong sustainability often reflects institutional biases in environmental scholarship, which—despite empirical links between growth and poverty alleviation—prioritizes hypothetical future harms over verifiable human welfare gains. Economic expansion has extracted over 660 million people from since 1990 via resource-intensive development, yet strong frameworks frequently dismiss such trade-offs, assuming preservationist stasis suffices for without accounting for innovation's role in enhancing future options. This overlooks causal realities where substitutable , not rigid , has empirically expanded intergenerational endowments.

Climate Policy and Resource Allocation

Climate policies framed around intergenerational equity often invoke projections of severe future harms from anthropogenic warming, such as increased , sea-level rise, and ecosystem disruptions, to justify aggressive emissions reductions. The (IPCC) posits that limiting warming to 1.5°C requires global net-zero CO2 emissions by mid-century, arguing this preserves equity by averting damages disproportionately borne by future generations unborn at decision time. However, these narratives have been critiqued for overstating risks while underemphasizing benefits of fossil fuel-driven development, which lifted over a billion people from since 1990 through affordable energy access. Such policies entail substantial resource reallocations, with estimates for achieving Agreement-aligned net-zero transitions exceeding $4 trillion annually in clean investments by the early , cumulative costs potentially reaching $120 trillion by 2050. These expenditures, often financed via public debt or taxes, risk diverting funds from immediate needs like alleviation and in developing nations, where growth slowdowns could perpetuate low living standards across generations. Critics argue this burdens current poorer cohorts—disproportionately in the Global South—to mitigate uncertain future scenarios, inverting equity principles by prioritizing speculative harms over verifiable present gains from industrialization. Empirical realism favors and over emission mandates, as evidenced by historical recoveries from the (circa 1300–1850), when European and societies endured 1–1.5°C cooling through agricultural shifts, trade networks, and resilient institutions without modern tech. By 2025, sees revival via small modular reactors and AI-driven demand, with U.S. projects like Palisades restart and private investments signaling scalable low-carbon capacity. (CCS) projects have surged 54% operationally, with global pipelines growing fourfold toward 2030, enabling continued fossil use while abating emissions in hard-to-decarbonize sectors. These advances suggest future generations inherit adaptive tools, not inherited , challenging alarmist framings that undervalue human ingenuity.

Social and Demographic Dimensions

Living Standards and Inequality Metrics

Global GDP per capita, a key indicator of average living standards, has risen substantially across generations, from approximately $2,524 in 1950 to $12,688 in (in current international dollars), reflecting more than a fivefold increase driven by technological advances, gains, and expanded . This growth has enabled successive cohorts to access higher levels of , , and healthcare compared to their predecessors, countering claims of intergenerational decline with of elevated material . The (HDI), which composites , , and , further underscores these improvements: the global HDI value climbed from 0.608 in 1990 to 0.732 in 2022, indicating broad-based advancements in human capabilities despite uneven distribution. , absolute upward mobility—defined as the share of children earning more than their parents—stood at about 50% for those born in the 1980s, down from 90% for the 1940 cohort but still evidencing net progress amid overall , as parental incomes were lower in real terms for earlier generations. Inequality metrics like the , which measure relative income dispersion, have faced criticism for prioritizing proportional gaps over absolute outcomes; for example, global relative inequality has declined since the due to faster growth in poorer nations, yet absolute dollar disparities have widened as baseline incomes rose universally. This relative focus can obscure how lower-income groups today enjoy higher absolute standards—such as access to , , and —than prior generations, with and facilitating cross-country convergence by lifting emerging economies at rates exceeding those of advanced ones. Empirical studies attribute much of this to market-driven rather than redistribution alone, challenging interpretations that overemphasize stasis in relative terms while downplaying causal drivers of absolute uplift.

Housing, Health, and Elder Care

In the United States, restrictive land-use regulations, including laws adopted and expanded since the , have significantly constrained supply, driving up costs beyond natural scarcity factors like . These policies, such as minimum lot sizes and mandates, limit new construction and disproportionately inflate home prices and rents, making homeownership less attainable for younger generations. For instance, the millennial homeownership rate stood at 45.5 percent in 2023, lagging behind previous cohorts at comparable ages, with rates for those under 35 persistently lower due to these regulatory barriers rather than solely economic cycles. This intergenerational disparity transfers housing wealth advantages to older owners while imposing delayed entry and higher burdens on younger buyers, as evidenced by millennial rates at age 40 reaching only 60 percent compared to 64 percent for . Healthcare entitlements, particularly , exemplify policy-driven strains where pay-as-you-go financing burdens current workers to fund benefits for retirees, projecting for the Hospital Insurance Trust Fund by 2033 under current law. This structure crowds out investments in preventive care, as spending prioritizes end-of-life treatments—accounting for a disproportionate share of lifetime costs—over upstream interventions that could enhance long-term efficiency. Despite U.S. healthcare expenditures nearing 18 percent of GDP, gains have been modest relative to peers, with increases plateauing for certain cohorts amid inefficient allocation favoring curative over preventive measures. Elder care amplifies these inequities, as and cover long-term services but rely on regressive payroll taxes from younger workers, exacerbating fiscal shortfalls projected into the 2030s. Unpaid family caregiving, often borne by working-age adults, imposes hidden costs estimated at $600 billion annually, diverting resources from personal savings and productivity for . Policies subsidizing institutional care over home-based alternatives further entrench dependency, with fewer than 15 percent of older adults able to afford combined and without burden, transferring intergenerational upward through mandated public funding mechanisms.

Aging Populations and Dependency Burdens

Declining fertility rates and rising life expectancies have driven a global demographic shift toward older populations, increasing the ratio of dependents to workers. The global total fertility rate stood at 2.3 children per woman in 2023, below the replacement level of 2.1 in many developed nations and projected to continue falling toward that threshold by mid-century. In Japan, the old-age dependency ratio reached 50.7% in 2024, meaning approximately two workers supported each retiree aged 65 and older, a trend expected to persist into 2025. The European Union exhibited a lower but rising ratio of 33.9% in 2024, with projections indicating acceleration toward 50% or higher by 2050 due to sustained low birth rates. These shifts stem primarily from socioeconomic factors including higher female education and labor participation, urbanization, and elevated child-rearing costs, compounded by advances in medical technology extending average lifespans. The resulting dependency burdens manifest in fiscal pressures on younger cohorts, including elevated taxes to fund services for the elderly and diminished personal savings or inheritances as resources are redirected toward intergenerational transfers. In aging societies, workers face reduced and incentives for , potentially stifling and . offers a partial by injecting younger labor, slowing the rise in dependency ratios; for instance, higher inflows could reduce Europe's aging-related fiscal strain by up to 9% under optimistic scenarios. However, sustained high immigration volumes often entail cultural challenges and long-term fiscal costs if newcomers exhibit lower rates or higher , limiting net benefits. Policy responses emphasizing pro-natal incentives, rather than coercive measures, have shown modest success in countering fertility declines. Hungary's post-2010 family policies, including lifetime exemptions for mothers of four or more children and housing subsidies, correlated with a rise in the from 1.25 in 2010 to around 1.6 by the early 2020s, averting an estimated 115,000 fewer births. Critics note that such gains remain below replacement levels and may reflect temporary rebounds rather than structural shifts, underscoring the need for broader cultural and economic reforms. Generous systems in developed nations may inadvertently accelerate fertility declines by substituting state support for traditional family-based old-age security, reducing the perceived need for children as economic assets. Empirical evidence suggests that incentives aligning child-rearing with personal financial rewards—such as tax credits and —outperform mandates, fostering voluntary increases in birth rates without distorting labor markets.

Measurement and Debates

Empirical Indicators and Challenges

Intergenerational accounting serves as a primary empirical tool to assess fiscal equity by attributing the present value of government revenues and expenditures to current and future generations, revealing imbalances through "deficit gaps." In the United States, such frameworks highlight net liabilities for unborn cohorts stemming from accumulated public debt and unfunded entitlements, with analyses estimating these burdens exceed trillions in present-value terms. Beyond fiscal metrics, the (GPI) critiques (GDP) for failing to account for intergenerational trade-offs, adjusting economic output by subtracting costs like and environmental damage while adding non-market benefits such as leisure time. GPI calculations, applied in various national contexts, often show stagnation or decline despite GDP growth, underscoring deficits passed to . Measuring these indicators faces inherent challenges, particularly in quantifying non-market goods like ecosystem services or long-term , where techniques yield inconsistent results due to hypothetical biases and interpersonal utility comparisons. Data limitations further complicate assessments, as standard metrics overlook heterogeneous life-cycle paths; for instance, while hold approximately 53% of U.S. as of 2022, younger generations exhibit rising through assets like , though at rates lagging historical norms. Youth perceptions reveal additional empirical hurdles, with 2025 foresight surveys indicating prevalent views of inequity—such as diminished , where only 50% of those born in the 1980s out-earn their parents at age 30 compared to 90% for 1940s cohorts—yet these subjective assessments diverge from objective trends in asset accumulation and living standards improvements. Prioritizing verifiable outcomes like cohort-specific holdings over self-reported gaps mitigates biases in intergenerational evaluations.

Discounting Rates and Future Valuation

The social discount rate determines the relative weight given to future versus present consumption in intergenerational resource allocation, derived from the Ramsey rule as r = \delta + \eta g, where \delta represents the pure rate of time preference, \eta the elasticity of marginal utility of consumption (often interpreted as aversion to inequality), and g the expected per capita consumption growth rate. This formula, originating from Frank Ramsey's 1928 analysis of optimal savings, incorporates positive time preference (\delta > 0) to reflect human impatience and uncertainty about survival or future states, alongside growth-induced discounting since future generations are anticipated to be wealthier and thus require smaller absolute utility transfers to equate marginal utilities. Empirical estimates of \delta range from 0.5% to 3%, with overall social discount rates typically falling between 3% and 7% when accounting for market interest rates, historical growth (around 2% annually in developed economies), and \eta values of 1 to 2. Positive discounting aligns with observed economic behavior and first-principles considerations of and productivity: resources invested today yield returns through , justifying prioritization of immediate needs over distant hypotheticals, as zero discounting (\delta = 0) would imply equal weighting of all future periods, potentially exhausting present resources in futile pursuit of infinitesimal per-period gains far ahead. This approach counters moralistic arguments for zero rates by emphasizing causal realities like mortality (reducing the effective number of future beneficiaries) and opportunity costs, where forgoing current investments in or diminishes overall growth trajectories. Historical , such as long-term yields averaging 4-5% in real terms, further validate rates above zero, as they reflect revealed preferences for present over future consumption. A prominent debate arose with the 2006 Stern Review on , which applied a near-zero \delta (0.1%) and resulting rate of about 1.4% to advocate aggressive emission reductions, prioritizing distant environmental costs over nearer-term development. Critics, including , argued this constitutes ethical overreach by imposing prescriptive egalitarianism across generations, diverging from empirical evidence and market rates (3-5%), which better capture productivity and uncertainty; such low rates inflate future damages disproportionately, sidelining verifiable present harms like poverty-related mortality. For instance, the Review's parameters imply society should sacrifice substantial current consumption for benefits accruing centuries hence, yet real-world analyses show higher preserves incentives for innovation while addressing immediate crises more effectively. In practice, low or zero discounting risks neglecting opportunity costs, such as diverting funds from proven interventions like insecticide-treated nets—which avert deaths at costs of $2,000-5,000 per life-year saved in high-burden regions—to uncertain long-term climate mitigation yielding delayed and probabilistic gains. With projected growth rendering 10-20 times wealthier by 2100 under baseline scenarios (g ≈ 1.5-2%), positive rates ensure equitable transfers without impoverishing the present, as absolute resource needs decline relative to future capacities; disregarding this imperils current alleviation, where empirical data show investments in yield returns exceeding 10% annually in developing contexts.

Trade-offs with Current Generation Needs

Addressing the needs of the current generation, particularly poverty alleviation, often conflicts with policies framed as safeguarding intergenerational equity, as short-term resource use enables long-term . For instance, approximately 750 million people lacked access to in 2023, predominantly in , where reliable energy is essential for . Fossil fuels, including , have historically powered industrialization in developing economies, facilitating and that later supports cleaner technologies, as evidenced by transitions in countries like the . Restricting such access prematurely, as in some strategies, exacerbates intragenerational inequities without proportionally benefiting future cohorts, since ending through growth has a negligible direct impact on cumulative emissions. Recent analyses from 2023 to 2025 underscore these tensions, revealing how preferences for aggressive future-oriented measures, such as stringent emissions , can prioritize hypothetical distant harms over verifiable current deprivations like . In societies, expanded entitlements—such as unfunded pensions and healthcare promises—further illustrate deferred costs, where current beneficiaries consume resources that could otherwise fund productive investments, effectively shifting burdens without addressing immediate inequities in to basics like . Empirical data indicate that such systems, if unreformed, crowd out growth essential for both present uplift and future resilience. Critics contend that an overemphasis on intergenerational claims sometimes rationalizes inaction on intragenerational priorities, creating false dichotomies rather than recognizing causal links through abundance. Historical evidence demonstrates that sustained , driven by incentives rather than centralized equity mandates, has simultaneously reduced current rates—from over 40% globally in 1980 to under 10% by 2019—and accumulated stocks benefiting successors, as seen in recoveries where expanded total resources. Top-down interventions, by contrast, often distort allocation, whereas decentralized markets have empirically fostered technological leaps, like in the , resolving apparent trade-offs by increasing overall prosperity. This approach aligns causal realism: prioritizing current enablement through growth debunks zero-sum views, as enhanced causally amplifies future options without sacrificing present needs.

References

  1. [1]
    Intergenerational Equity - an overview | ScienceDirect Topics
    Intergenerational equity refers to the fair access to resources that ensures equal opportunities for both current and future generations, emphasizing the ...
  2. [2]
    Intergenerational Equity - Oxford Public International Law
    Intergenerational equity means every generation shares the Earth, and the present generation must pass it on no worse than received, ensuring future ...
  3. [3]
    Promoting intergenerational equity calls for strategic investments in ...
    Sep 27, 2024 · Intergenerational equity refers to the fair and just distribution of benefits and burdens among groups between current and future generations.Commentary · Main Text · Long-Lasting Capital Systems...
  4. [4]
    (PDF) Intergenerational equity of public debt - ResearchGate
    Aug 6, 2025 · The intergenerational equity of public debt means that it is not the future generations, but those who receive the public goods and services that should pay ...
  5. [5]
    [PDF] Budget Deficits and the Intergenerational Distribution of Lifetime ...
    If public debt can be retained indefinitely, and even grow at the same rate as the economy, then, while permanently debt-financed government spending still has ...
  6. [6]
    The Impact of Public Debt on Economic Growth: What the Empirical ...
    Aug 13, 2025 · High and rising debt levels raise concerns about fiscal sustainability, intergenerational equity, and potential constraints on future policy ...
  7. [7]
    Intergenerational Equity (Chapter 14) - The Cambridge Handbook ...
    Intergenerational equity is a legal principle reflected in international treatiesFootnote and soft law instruments,Footnote and recognised by many international ...
  8. [8]
    Gaslighting Intergenerational Equity - The Breakthrough Institute
    May 29, 2024 · For many years, it has been a standard claim of the climate movement that the issue is centrally one of intergenerational equity.
  9. [9]
    A critical evaluation of inter-generational equity and its application in ...
    Feb 22, 2023 · A critical evaluation of inter-generational equity and its application in the climate change context. February 2023.
  10. [10]
    Pollution perception: A challenge for intergenerational equity
    In this article we extend the recent literature on overlapping generations and pollution by allowing generations to perceive the level of pollution differently.
  11. [11]
    Intergenerational Equity and the Investing of Rents from Exhaustible ...
    One should of course consult Rawls, Arrow, and. Robert Solow for an introduction to the diverse no- tions of intergenerational equity which have been proposed ...
  12. [12]
    Intergenerational Equity and the Investing of Rents from Exhaustible ...
    Hartwick (1977) proposed that reinvesting all net rents derived from exhaustible resources into reproducible capital would make it possible to achieve ...
  13. [13]
    Intergenerational equity: The capital-environment trade-off
    This paper examines the trade-off between capital accumulation and environmental quality that determines an intergenerationally equitable program according ...Missing: preservation | Show results with:preservation
  14. [14]
    Life Expectancy - Our World in Data
    Across the world, people are living longer. In 1900, the average life expectancy of a newborn was 32 years. By 2021 this had more than doubled to 71 years.Life expectancy: what does this · Twice as long · Higher death rates · GDP per capita
  15. [15]
    Poverty - Our World in Data
    According to the World Bank, the number of people in extreme poverty increased by around 50 million between 2019 and 2020, marking the first substantial rise ...Share of population living in... · Extreme poverty · Data Explorer
  16. [16]
    Global Progress in Reducing Extreme Poverty Grinds to a Halt
    Oct 5, 2022 · As a result, an estimated 719 million people subsisted on less than $2.15 a day by the end of 2020. “Progress in reducing extreme poverty has ...
  17. [17]
    THE LOCKEAN RIGHTS OF BEQUEST AND INHERITANCE
    Aug 15, 2011 · Locke at times describes the right to parental support as conveying to children “a Title to their Father's Estate for their Subsistence.” 51 ...
  18. [18]
    Property: John Locke, Second Treatise, §§ 25--51, 123--26
    Though the Earth, and all inferior Creatures be common to all Men, yet every Man has a Property in his own Person. This no Body has any Right to but himself.
  19. [19]
    [PDF] INTERGENERATIONAL - JUSTICE AND SAVING Clark Wolf
    Rawls's veil of ignorance does extend to generational membership, so the parties to the original position do not know in which generation, or at what stage ...
  20. [20]
    [PDF] Intergenerational Justice I: Rawls' Just Savings Principle - Ryan Doody
    Apr 19, 2022 · Just Savings Principle: We ought to leave enough for future gen- erations to establish and preserve a just basic structure over time— one that ...
  21. [21]
    [PDF] The Non-Identity Problem - rintintin.colorado.edu
    This is the part that covers how we affect future generations. This is the most important part of our moral theory, since the next few centuries will be the ...
  22. [22]
    [PDF] Parfit and Non-Identity Problem Abstract - PhilArchive
    toward future generations. This problem concerns the duties that a certain individual has towards other people that hasn't been born yet but whenever they ...
  23. [23]
    Intergenerational Justice - Stanford Encyclopedia of Philosophy
    Apr 3, 2003 · Rawls proposes a principle of “just savings”. Long before Rawls Frank Ramsey developed a model for determining the optimal savings within a ...How Intergenerational... · How to Specify the Threshold · The Significance of Past...
  24. [24]
    [PDF] Some Thoughts on Shortsightedness and Intergenerational Equity
    Each generation is thus both a trustee for the planet with obligations to care for it and a beneficiary with rights to use it. 13. With respect to natural ...Missing: trusteeship | Show results with:trusteeship
  25. [25]
    [PDF] Philosophical Origins of the Social Rate of Discount in Cost-Benefit ...
    The social rate of discount is based on either individual preferences or opportunity cost. Philosophers and economists have different views on which should be ...
  26. [26]
    Philosophical origins of the social rate of discount in cost-benefit ...
    The social rate of discount is how decision makers evaluate future consequences of collective activity, raising intergenerational justice issues. There is no ...
  27. [27]
    [PDF] Justice in Aristotle's Household and City - PhilArchive
    Thus, in this paper I explore the relationships between father and son, husband and wife, master and slave, and between siblings in order to see what they tell ...Missing: intergenerational | Show results with:intergenerational
  28. [28]
    [PDF] Social Justice and Health Care Management: An Elusive Quest?
    For Aristotle, equality was seen as the very means of justice. ... 173 This, of course, once again raises the issue of intergenerational equity or justice.
  29. [29]
    Fideicommissum and Law (Chapter 6)
    A fideicommissum was a trust, adapted from Roman law, used to keep property within a family, preventing loss of patrimony and alienation of key properties.
  30. [30]
    Testamentary Formalities in Roman Law - Oxford Academic
    A fideicommissum was a request by the testator to a beneficiary under the will to turn over all or part of what he received to a third person. While, originally ...
  31. [31]
    Second Treatise of Government - Project Gutenberg
    Dec 25, 2021 · John Locke's “Second Treatise of Government” was published in 1690. The complete unabridged text has been republished several times in edited commentaries.Missing: proviso | Show results with:proviso<|separator|>
  32. [32]
    Adam Smith's Invisible Hand
    Nov 30, 2018 · The Invisible Hand is perhaps the most important—and most controversial—metaphor in economics. For fans of markets, it is synonymous with free ...Missing: posterity growth
  33. [33]
    [PDF] Population, Technology, and Growth: From Malthusian Stagnation to ...
    Oct 19, 1999 · This paper develops a unified growth model that captures the historical evolution of population, technology, and output.Missing: warnings falsified
  34. [34]
    Malthusian Theory Has Always Been False - Quillette
    Sep 8, 2022 · “Malthus believed that history validated his theory, which it did,” they write. This was, according to the authors, because technological ...<|control11|><|separator|>
  35. [35]
    [PDF] intergenerational equity and exhaustible resources
    In the way that growth theory has made familiar, the inherited capital stock and the exogenously given supply of labor determine current full-employment output; ...
  36. [36]
    Historical Background and Development of Social Security
    Indeed, by the time America adopted social insurance in 1935, there were 34 nations already operating some form of social insurance program(about 20 of these ...Missing: intergenerational | Show results with:intergenerational
  37. [37]
    [PDF] social security and institutions - for intergenerational
    Benefits for each retired person may be tied to that person's lifetime income without causing (as with the US benefits formula today) aggregate benefits for all ...<|separator|>
  38. [38]
    [PDF] Our Common Future: Report of the World Commission on ...
    The Concept of Sustainable Development. I. Equity and the Common Interest. II. Strategic Imperatives. III. Conclusion. IV.
  39. [39]
    [PDF] Sustainability: An economist's perspective
    ROBERT M. SOLOW. Robert M. Solow is Institute Professor of Economics at the. Massachusetts Institute of Technology and a Nobel. Laureate in Economics.Missing: critique stasis
  40. [40]
    Real gross domestic product per capita (A939RX0Q048SBEA) - FRED
    Graph and download economic data for Real gross domestic product per capita (A939RX0Q048SBEA) from Q1 1947 to Q2 2025 about per capita, real, GDP, and USA.
  41. [41]
    United Nations Millennium Development Goals
    The eight Millennium Development Goals (MDGs) – which range from halving extreme poverty rates to halting the spread of HIV/AIDS and providing universal ...Background · Extreme poverty and hunger · Global Partnership · MDG MomentumMissing: intergenerational | Show results with:intergenerational
  42. [42]
    Intergenerational Equity and the Sustainable Development Goals
    Oct 23, 2018 · An important principle was the principle of intergenerational equity, according to which “States [should] conserve and use the environment and ...
  43. [43]
    Future We Want - Outcome document
    We recognize the importance of the three Rio conventions for advancing sustainable development and in this regard we urge all parties to fully implement their ...
  44. [44]
    lessons learnt 2000–2020 | International Environmental Agreements
    Apr 15, 2022 · In this section, we review a selection of INEA studies on the efficiency, effectiveness, and equity of IEAs, including the European Water ...
  45. [45]
    Notes from our intergenerational fairness journey - EU Policy Lab
    Jun 20, 2025 · The overall aim of this future strategy is to build a fairer society by empowering all generations, both current and future, to create together their desired ...
  46. [46]
    EU Commission seeks to bridge generation gap with 'fairness index'
    Apr 29, 2025 · As part of its upcoming 2026 Strategy on Intergenerational Fairness, the European Commission is developing an Index of Intergenerational ...
  47. [47]
    FFD4 side event: Youth moving beyond GDP - UNCTAD
    – Setting the scene: High-level officials will highlight the importance of inter-generational equity in advancing beyond-GDP approaches as a crucial element of ...
  48. [48]
    Event Summary | Youth Moving Beyond GDP: Intergeneratio
    Jul 28, 2025 · The event discussed moving beyond GDP, emphasizing intergenerational equity, new metrics, and the need to reorient finance to invest in what we ...
  49. [49]
    In Pursuit of Intergenerational Equity: Inflation Is the Big Headwind
    Apr 7, 2025 · April 7, 2025 Blog Post ... Returning to the original point, by whichever means inflation is measured, it has a corrosive effect on endowments.Missing: analysis | Show results with:analysis
  50. [50]
    [PDF] Intergenerational Income Mobility around the World
    The database also reveals a positive association between income mobility and national income per capita, suggesting that countries achieve higher levels of.Missing: equity | Show results with:equity
  51. [51]
    Setting the scene: Demographic change, economic growth ... - OECD
    Jul 9, 2025 · This chapter sets the scene for the thematic part of this OECD Employment Outlook 2025, which is devoted to ageing and the labour market.
  52. [52]
    The National Debt Can Crowd Out Investments in the Economy
    Apr 23, 2025 · Large amounts of federal debt could “crowd out” investments by the private sector, making the economy less productive and stunting wage ...Missing: evidence | Show results with:evidence
  53. [53]
    United States Gross Federal Debt to GDP - Trading Economics
    The United States recorded a Government Debt to GDP of 124.30 percent of the country's Gross Domestic Product in 2024. This page provides - United States ...
  54. [54]
    Total Public Debt as Percent of Gross Domestic Product ... - FRED
    View the ratio of federal debt to the economic output of the U.S., which can indicate economic health and the sustainability of government borrowing.
  55. [55]
    [PDF] Growth in a Time of Debt - Harvard University
    On average, public debt rose by more than 80 percent within three years after a crisis. Growth in a Time of Debt. By Carmen M. Reinhart and Kenneth S. Rogoff*.
  56. [56]
    [PDF] Does High Public Debt Consistently Stifle Economic Growth? A ...
    Apr 15, 2013 · Overall, the evidence we review contradicts. Reinhart and Rogoff's claim to have identified an important stylized fact, that public debt loads ...
  57. [57]
    Debt and Growth: A Decade of Studies | Mercatus Center
    Apr 15, 2020 · The empirical evidence overwhelmingly supports the view that a large amount of government debt has a negative impact on economic growth potential.<|separator|>
  58. [58]
    [PDF] Distributional Crowding Out Effects of Public Debt
    This paper examines the impact of public debt on private firms' investment using the World Bank Enterprise. Surveys, which provide a large sample of firms in ...
  59. [59]
    Public Debt,Its Impact on GDP & Crowding out effect:Evidence from ...
    Aug 26, 2024 · Private investment is neagatively correlated with public debt and positive related with GDP. Hence this relationship proves the crowding out ...
  60. [60]
    Government Spending in Historical Context - Foundation
    During the 1800s, the federal government reported a surplus in 69 years and a deficit in 31 years. After that, deficits became far more common, occurring in 70 ...Missing: pre- | Show results with:pre-
  61. [61]
    Federal Budget Receipts and Outlays: | The American Presidency ...
    Total includes both "on-budget" and "off-budget" amounts. Source(s). • compiled by Gerhard Peters from "Historical Tables, Budget of the United States ...Missing: post | Show results with:post
  62. [62]
    National Deficit | U.S. Treasury Fiscal Data
    Learn about the national deficit, the difference between budget deficit and debt, and how the deficit has changed over time.Missing: 1970s post<|separator|>
  63. [63]
    Risks and Threats from Deficits and Debt-Thu, 07/14/2022 - 12:00
    Jul 14, 2022 · In fact, deficit spending helped to prevent an economic catastrophe and support the country through a pandemic in the recent COVID-19 crisis.
  64. [64]
    America's Social Security System: The Case for Privatizing
    Apr 15, 1998 · Social Security in the United States, as it is in most nations in the world, is a pay-as-you-go system and has been except for the first couple ...
  65. [65]
    Social Security Act (1935) | National Archives
    Feb 8, 2022 · On August 14, 1935, the Social Security Act established a system of old-age benefits for workers, benefits for victims of industrial accidents, ...Missing: intergenerational compact
  66. [66]
    Why was Social Security designed as a transfer payment system ...
    Mar 15, 2025 · It isn't a personal retirement account. It's more of an intergenerational transfer payment system.
  67. [67]
    [PDF] the 2025 annual report of the board of trustees of the federal old-age ...
    Jun 30, 2025 · Social Security Fairness Act of 2023: Enacted on January 5, 2025 ... The ratio of reserves to annual cost is projected to decline from. 169 ...
  68. [68]
    Old-age dependency ratio - OECD
    Old-age dependency ratio is the number of individuals aged 65 or older per 100 people of working age, defined as those aged between 20 to 64 years old.
  69. [69]
    OECD Employment Outlook 2025: Setting the scene: Demographic ...
    Jul 9, 2025 · The OECD old-age dependency ratio increased from 19% in 1980 to 31% in 2023 and is projected to rise further to 52% by 2060. Because of ...
  70. [70]
    The Long-Term Budget Outlook: 2025 to 2055
    Mar 27, 2025 · This report presents the Congressional Budget Office's projections of what the federal budget and the economy would look like over the next 30 years.
  71. [71]
    Five Reasons Why Social Security Is an Income Transfer Program ...
    Aug 21, 2024 · Like a Ponzi scheme, Social Security relies on revenues from new workers to pay for promises made to previous generations. Unlike Ponzi's scheme ...Missing: criticisms | Show results with:criticisms
  72. [72]
    Is the Public Pensions System a Ponzi Scheme? - Sharpen Your Axe
    Apr 5, 2025 · Pensions really do share certain characteristics with pyramid schemes, which are often tagged after Charles Ponzi, an Italian charlatan who ...
  73. [73]
    [PDF] Pension Reform in Chile Revisited: What Has Been Learned? - OECD
    Apr 8, 2009 · The paper describes Chile's pension reform of 1980, which replaced the existing pay-as-you-go public pension programs by a new funded ...
  74. [74]
    [PDF] Privatizing Social Security: The Chilean Experience
    The Chilean pension system is not a fully privatized system. The ... The private pension system in Chile is still young, with relatively few beneficiaries.
  75. [75]
    (PDF) The Chilean Pension System at 25 Years: The Evolution of a ...
    Aug 8, 2025 · The 1981 reform of the Chilean pension system was revolutionary at its time. It was the first instance of a mature public Pay-As-You-Go social ...
  76. [76]
    [PDF] Capital Accumulation and Growth: The Solow Model
    The Solow Model. Page 11. IS CAPITAL ACCUMULATION KEY TO GROWTH? Seems plausible! Conventional wisdom in 1950s: Yes! See discussion in Easterly (2002). Solow ( ...
  77. [77]
    [PDF] East Asian miracle - World Bank Documents & Reports
    Explaining East Asia's High Investment Rates. Q JNE OF THE MOST REMARKABLE ASPECTS OF THE HPAEs IS their unusually high rates of private investment. Private ...Missing: intergenerational | Show results with:intergenerational
  78. [78]
    [PDF] The East Asian Miracle: Four Lessons for Development Policy
    '2 High investment rates are part of the Asian success story, but they cannot fully explain the extent to which per capita income growth in the HPAEs ...Missing: intergenerational | Show results with:intergenerational
  79. [79]
    Does regulation hurt innovation? This study says yes - MIT Sloan
    Jun 7, 2023 · They concluded that the impact of regulation is equivalent to a tax on profit of about 2.5% that reduces aggregate innovation by around 5.4%.).
  80. [80]
    FAQs: September 30, 2025 budget update | Office of the Provost
    Sep 30, 2025 · Each year, the university must set aside 3% of the endowment return to account for inflation. This keeps the purchasing power of the ...
  81. [81]
    https://www.harvardmagazine.com/university-finances/harvard-endowment-financial-report-fiscal-year-2025
  82. [82]
    The Impact of Regulation on Innovation | Cato Institute
    Apr 19, 2023 · There is considerable research on the economic impacts of regulations but relatively few studies about their impact on technological innovation.Missing: R&D | Show results with:R&D
  83. [83]
    Developing a strong sustainability research program in marketing
    Dec 10, 2020 · The main definitional difference between weak sustainability (WS) and strong sustainability (SS) is how one views ecosystem services. WS asserts ...
  84. [84]
    Julian Simon Was Right: A Half-Century of Population Growth ...
    Feb 16, 2018 · Instead of killing whales for lamp oil, for instance, we burn coal, oil, and gas. In fact, humanity is yet to run out of a single nonrenewable ...Missing: critiques strong
  85. [85]
    How Julian Simon Won a $1,000 Bet with "Population Bomb" Author ...
    Mar 8, 2018 · If the combined prices rose above $1,000, Simon would pay the difference. If they fell below $1,000, Ehrlich would pay Simon the difference.Missing: outcome | Show results with:outcome
  86. [86]
    The Commodity Markets Outlook in eight charts - World Bank Blogs
    May 13, 2025 · Commodity prices are projected to decline in 2025, driven by improved supplies, policy uncertainty, and an expected slowdown in global economic growth.Missing: evidence | Show results with:evidence
  87. [87]
    The truth about climate action versus economic growth | Brookings
    May 3, 2023 · The conclusion in favor of seeing growth and poverty reduction as complementary with environmental protection and climate action for the most ...
  88. [88]
    The Green Economy: Incremental Change or Transformation?
    Aug 14, 2013 · The World Bank (2012) argues that economic growth, while it has been environmentally damaging, has lifted 660 million people out of poverty over ...
  89. [89]
    [PDF] Chapters - IPCC
    This chapter frames the context, knowledge-base and assessment approaches used to understand the impacts of 1.5°C global warming above pre-industrial levels and ...
  90. [90]
    Executive summary – Net Zero Roadmap: A Global Pathway to ... - IEA
    The world is set to invest a record USD 1.8 trillion in clean energy in 2023: this needs to climb to around USD 4.5 trillion a year by the early 2030s to be in ...
  91. [91]
    How Nordic societies weathered the last climate crisis | CAS
    Feb 28, 2025 · The Little Ice Age, spanning from 1300 to 1900, brought an average temperature drop of 1.5 degrees Celsius to the Nordic region.
  92. [92]
    State of the Nuclear Energy Industry 2025
    May 20, 2025 · Demand from AI and data centers are bringing Big Tech to the nuclear table. · Private capital is pouring into nuclear, and the U.S. is stepping ...
  93. [93]
    Carbon Capture Stays the Course Despite Global Headwinds, with ...
    Oct 15, 2025 · “A 54% rise in operating projects shows real, accelerating progress. CCS is now operating across a diverse array of sectors, proving its ...
  94. [94]
    The Path to a New Era for Nuclear Energy - IEA
    Jan 16, 2025 · This report reviews the status of nuclear energy around the world and explores risks related to policies, construction and financing.Status of nuclear energy · Financing nuclear projects · Executive Summary
  95. [95]
    GDP per capita - Our World in Data
    GDP per capita is a comprehensive measure of people's average income. It helps compare income levels across countries and track how they change over time.
  96. [96]
    GDP per capita - Our World in Data
    PWT version 11.0 is a database with information on relative levels of income, output, input and productivity, covering 185 countries between 1950 and 2023.
  97. [97]
    Human Development Index (HDI)
    The Human Development Index (HDI) is a summary measure of average achievement in key dimensions of human development: a long and healthy life, being ...Human development · The 2025 Human... · Human Climate Horizons data... · News
  98. [98]
    The Fading American Dream: Trends in Absolute Income Mobility ...
    We find that rates of absolute mobility have fallen from approximately 90% for children born in 1940 to 50% for children born in the 1980s.
  99. [99]
    Global income inequality down in relative terms, up in absolute sums
    Aug 25, 2016 · In contrast, absolute inequality, measured by the absolute Gini coefficient and depicted by the red line in the graph, has increased ...
  100. [100]
    Trade and Globalization - Our World in Data
    After World War II trade started growing again. This new – and ongoing – wave of globalization has seen international trade grow faster than ever before. Today ...
  101. [101]
    [PDF] Globalization, Trade, and Inequality: Evidence from a New Database
    Nov 22, 2024 · The study found that globalization increased international trade by 570% (1990-2019) and benefited most countries, with variation across ...
  102. [102]
    Land Use Regulation and Housing Affordability - The CGO
    Sep 13, 2021 · Every city in the US has implemented regulations limiting the amount of housing that can be built and raising the cost of construction.
  103. [103]
    The Impact of Zoning on Housing Affordability
    This paper examines whether there is a housing affordability problem in America by comparing house prices to the costs of new construction.
  104. [104]
    The effects of residential zoning in U.S. housing markets
    The results show that minimum lot size regulations increase home sizes, sales prices, and rents. Moreover, restrictive zoning disproportionately attracts high- ...
  105. [105]
    Addressing Challenges to Affordable Housing in Land Use Law
    Feb 10, 2022 · Restrictive zoning rules, like single-family zoning, reduce the supply of land available for new housing, which in turn inflates the cost of new ...
  106. [106]
    Apartment List's 2024 Millennial Homeownership Report
    Sep 12, 2024 · The Millennial homeownership rate stands at 45.5 percent in 2023. As expected, rates are higher for older generations.
  107. [107]
    Millennial Homeownership | Urban Institute
    Jul 11, 2018 · This study shows that the homeownership rate for millennials was 37 percent in 2015, or about 8 percentage points lower than that of the two previous ...Missing: US | Show results with:US
  108. [108]
    Regulations keep homeownership out of reach for young Americans
    Jul 21, 2022 · Among the oldest batch of millennials who reached age 40 in 2021, the homeownership rate is 60 percent. In comparison, 64 percent of Gen ...Missing: restrictions | Show results with:restrictions<|separator|>
  109. [109]
    Analysis of the 2025 Medicare Trustees' Report
    Jun 18, 2025 · The Medicare Trustees project that the Medicare Hospital Insurance (HI) trust fund will be insolvent in 2033 with a 75-year shortfall of 0.42 to 1.28 percent ...
  110. [110]
    The Lifetime Distribution of Health Care Costs - PMC - NIH
    Spillman and Lubitz (2000) estimated that total expenditures from the age of 65 years until death increase substantially with longevity, from $36,000 for ...Missing: gains efficiency
  111. [111]
    Global Perspective on U.S. Health Care - Commonwealth Fund
    Jan 31, 2023 · The U.S. spends nearly 18% of GDP on healthcare, has the lowest life expectancy, highest avoidable deaths, and lacks universal coverage, ...
  112. [112]
    How does U.S. life expectancy compare to other countries?
    Jan 31, 2025 · Healthcare spending has grown faster in the U.S. than in peer countries, while life expectancy grows more slower in the U.S. than in peer ...Missing: efficiency | Show results with:efficiency
  113. [113]
    [PDF] 2025 Medicare Trustees Report - CMS
    Jun 18, 2025 · We have the honor of transmitting to you the 2025 Annual Report of the Boards of Trustees of the. Federal Hospital Insurance Trust Fund and the ...
  114. [114]
    The Big Picture: The True Cost of Taking Care of Aging Americans
    Jan 30, 2025 · In fact, AARP has estimated that the cost of unpaid care to caregivers amounts to $600 billion a year. Caring for aging relatives can also have ...Missing: intergenerational | Show results with:intergenerational
  115. [115]
    Fewer Than 15% of Older Adults Can Afford Combined Costs of ...
    Dec 11, 2023 · Approximately one-third of older adult households were cost-burdened in 2022, and nearly 50% of these households were severely cost-burdened.Missing: intergenerational | Show results with:intergenerational
  116. [116]
    Fertility Rate - Our World in Data
    Globally, the total fertility rate was 2.3 children per woman in 2023. This is much lower than in the past; in the 1950s, it was more than twice as high: 4.9.
  117. [117]
    Japan - Age Dependency Ratio, Old (% Of Working-age Population)
    Age dependency ratio, old (% of working-age population) in Japan was reported at 50.66 % in 2024, according to the World Bank collection of development ...
  118. [118]
    Population structure and ageing - Statistics Explained - Eurostat
    As a result of the population movement between age groups, the EU's old-age dependency ratio is projected to almost double from 33.9% in 2024 to 59.7% by 2100 ...
  119. [119]
    What is driving the global decline of human fertility? Need for a ...
    In the short-term, socioeconomic factors, particularly urbanization and delayed childbearing are powerful drivers of reduced fertility. In parallel, lifestyle ...
  120. [120]
    What does the global decline of the fertility rate look like?
    Jun 17, 2022 · For the last 50 years, fertility rates have decreased worldwide, due to women's empowerment, lower child mortality and increased cost of ...
  121. [121]
    Immigration and the Fiscal Burden of Aging in Europe
    Sep 20, 2024 · Eliminating immigration raises the fiscal burden of aging by 16%, while doubling inflows reduces it by only 9%.
  122. [122]
    Can Immigration Solve the Demographic Dilemma? – IMF F&D
    More immigration, especially in rapidly aging countries, would help slow the growth of the age dependency ratio. While immigrants will eventually age, a ...
  123. [123]
    The demographic divide: inequalities in ageing across the European ...
    Mar 27, 2025 · By 2050, working-age populations are projected to decline in 22 out of 27 EU countries, while the share of those aged 85+ in the EU as whole will more than ...
  124. [124]
    Helping Hungarians Have All the Babies They Want | Balkan Insight
    Sep 23, 2021 · Novak goes further: “Without the pro-family policies,” she says, “115,000 fewer children would have been born since 2010.” But can the shrinkage ...
  125. [125]
    Evaluating pronatalist policies with TFR brings misleading conclusions
    Mar 4, 2024 · Hungarian policy makers pointed at the TFR increasing from a record low of 1.25 in 2010 (when Viktor Orbán returned to power as prime minister) ...
  126. [126]
    Declining birth rate in Developed Countries: A radical policy re-think ...
    There are several factors such as lifestyle factors, an increase in sexually transmitted diseases, rise in obesity and environmental factors involved in ...
  127. [127]
    Hungary and Pro-Natalist Policy - Center for Freedom and Prosperity
    Apr 27, 2022 · Let's assume that Hungary's pro-natalist policies deserve credit for boosting the fertility rate from 1.3 to 1.6. That seems impressive, but ...
  128. [128]
    [PDF] Public Policy Brief - Levy Economics Institute of Bard College
    In intergenerational accounting, federal government revenue and expenditure streams are com- pared over very long periods. “Deficit gaps” are then used to ...
  129. [129]
    Generational Accounts: A Meaningful Alternative to Deficit Accounting
    This paper presents a set of generational accounts that can be used to assess the fiscal burden that current generations are placing on future generations.<|separator|>
  130. [130]
    Analysis Design and meaning of the genuine progress indicator
    The Genuine Progress Indicator (GPI) was designed to reveal the trade-offs between costs and benefits of economic growth.Missing: equity | Show results with:equity
  131. [131]
    [PDF] Updating the Genuine Progress Indicator for the State of Hawaiʻi
    The Genuine Progress Indicator (GPI) is an indicator of economic welfare representing the costs and benefits of economic activity. GPI has evolved since the ...
  132. [132]
    [PDF] Measuring the market value of non-market goods
    Although non-market goods are not directly allocated through markets, some of these goods are allocated through markets in an indirect fashion.
  133. [133]
    Distribution of Household Wealth in the U.S. since 1989
    Sep 19, 2025 · Note: Distributions by generation are defined by birth year as follows: Silent and Earlier=born before 1946, Baby Boomer=born 1946-1964, Gen ...Compare Wealth Components... · Table · Distributional Financial Accounts
  134. [134]
    Visualizing America's Wealth Distribution by Generation
    Sep 22, 2025 · In this graphic, we break down $163.1 trillion in wealth by generation, highlighting the continued dominance of the Boomer generation.
  135. [135]
    How does the Well-Being of Young Adults Compare to Their Parents'?
    Dec 18, 2024 · A report in Science found that 90 percent of children born in the 1940s earned more than their parents did at age 30, while only half of children born in the ...
  136. [136]
    Youth Foresight Research on Intergenerational Equity
    This collaborative youth-led research project explores how young people around the world define and perceive intergenerational equity, also known as fairness ...Missing: perceptions | Show results with:perceptions
  137. [137]
    [2025 Generation Perception Survey] Generational conflict and ...
    Mar 25, 2025 · 84% of people say that generational conflict is serious in our society. More than 80% of people across all age groups perceive generational conflict to be ...Missing: intergenerational | Show results with:intergenerational
  138. [138]
    Ramsey and Intergenerational Welfare Economics
    Jun 1, 2019 · The Ramsey Rule gives the DM an equation for determining the initial growth rate of consumption, but it does not say what the initial level of ...Production Possibilities in... · The Ramsey Rule and Its...
  139. [139]
    [PDF] The Social Discount Rate: A Baseline Approach - Mercatus Center
    The Ramsey rule recommends setting the SDR equal to r in this equation. Let us consider these parameters one at a time as a basis for discounting. An SDR that ...
  140. [140]
    [PDF] DISCOUNTING FOR PUBLIC POLICY: THEORY AND RECENT ...
    Current discount rates are 7% and 3%, but evidence suggests lowering them, with a plausible lower rate of 2% and an upper rate also likely reduced.
  141. [141]
    Nordhaus vs. Stern | Cato at Liberty Blog
    Nov 28, 2006 · Most economist use discount rates ranging from 3–5% when trying to put a price tag on future damages. Stern argues that this is ethically ...<|separator|>
  142. [142]
    Discounting in Economic Evaluations - PMC - NIH
    May 19, 2018 · The first is whether to use empirical estimates to set an appropriate discount rate for costs and effects or a normative framework. In the case ...
  143. [143]
    [PDF] Time discounting and time preference - Carnegie Mellon University
    Time discounting is caring less about future consequences, while time preference is preferring immediate utility over delayed utility.
  144. [144]
    Ethics and Discounting Global Warming Damages
    Oct 30, 2009 · One of the more controversial, the 2006 review by Nicholas Stern ... discount rate of the Stern Review and higher market interest rates.Missing: critiques | Show results with:critiques
  145. [145]
    Stern Review - Wikipedia
    ... discount rate. With regards to criticisms of the discount rate, Stern accepted that differences of opinion could exist on his ethical choice for the PTP ...Positive critical response · Negative critical response · Response of economists
  146. [146]
    [PDF] A Critique of the Stern Report - Yale University
    But, critical to the Stern Report, the low discount rate implies far future events are important in the near term. Despite arguing for the low discount rate in ...
  147. [147]
    "The "Stern Review" and its Critics: Implications for the Theory and ...
    The Stern Review found high climate change costs and recommended rapid emission cuts. It was criticized for damage estimates and parameter values.
  148. [148]
    Costs and consequences of large-scale vector control for malaria
    Dec 17, 2008 · ITNs are more cost-effective than IRS for highly endemic settings, especially if high ITN coverage can be achieved with some demographic targeting.Missing: climate mitigation
  149. [149]
    Climate Change and Malaria - A Complex Relationship - UN.org.
    The economics of decreasing malaria transmission by mitigating climatic changes via carbon dioxide emissions, versus using other methods, have been modelled. It ...<|control11|><|separator|>
  150. [150]
    Access to electricity – SDG7: Data and Projections – Analysis - IEA
    The number of people worldwide lacking access to electricity in 2023 declined to 750 million people, about 10 million less than in 2022.
  151. [151]
    The World Bank's “All of the Above” Approach to Energy in Poor ...
    Apr 18, 2025 · Natural gas played a key role in the energy transition of the United States and can lift countries out of poverty. Gas fuels power plants, ...
  152. [152]
    Ending extreme poverty has a negligible impact on global ... - Nature
    Nov 29, 2023 · Growing consumption is both necessary to end extreme povertyand one of the main drivers of greenhouse gas emissions, creating a potential ...
  153. [153]
    Are current generations' preferences the primary barrier to climate ...
    Jun 13, 2025 · This paper argues that the climate economics literature often overlooks the role of generational self-interest in hindering ambitious climate change mitigation.
  154. [154]
    Intergenerational harm and injustice in ageing democracies
    Jul 30, 2025 · Current societies are failing younger and future generations, instead prioritising the interests and preferences of older cohorts.