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Penn World Table

The Penn World Table (PWT) is a comprehensive database that supplies internationally comparable estimates of real gross domestic product (GDP), productivity, capital inputs, and other key economic indicators for 185 countries spanning the years 1950 to 2023, with data adjusted using purchasing power parities (PPPs) to facilitate cross-country and intertemporal analyses of economic performance and living standards.^[1] Originating in the 1970s at the University of Pennsylvania, the PWT was initially developed by economists Irving B. Kravis, Alan Heston, Robert Summers, and Bettina Aten, who compiled versions up to 7.1 by integrating national accounts data with PPP benchmarks from the International Comparison Program (ICP) to create a standardized set of economic time series denominated in common prices.^[2]^[3] Since version 8.0, released in 2013, the project has been led by Robert C. Feenstra at the University of California, Davis, and Robert Inklaar and Marcel P. Timmer at the University of Groningen's Groningen Growth and Development Centre (GGDC), marking a "next generation" overhaul that incorporated improved methodologies for output-side real GDP, human capital adjustments, and capital services to better support growth accounting and productivity research.^[4] The latest edition, PWT 11.0, published on October 7, 2025, extends coverage to include updated national accounts, recent ICP benchmarks, and enhanced estimates of comparative price levels and productivity growth, making it an essential resource for empirical economics, policy analysis, and academic studies on global inequality and development.^[1]^[5] Key features include variables for both expenditure- and output-side GDP in current and chained PPPs, population figures, and inputs like employment and capital stocks, all licensed under Creative Commons Attribution 4.0 for broad accessibility via platforms such as DataverseNL.^[1]^[6]

Overview

Purpose and Scope

The Penn World Table (PWT) is a comprehensive database that provides estimates of real GDP, productivity, and related economic variables, all adjusted for purchasing power parity (PPP) to enable meaningful international comparisons.^[7] By converting national accounts data into a common currency and price level framework, the PWT addresses the limitations of nominal exchange rates, which often fail to reflect true differences in living costs and output across countries.^[7] This PPP adjustment ensures that the data capture relative economic performance rather than absolute monetary values, making it a vital resource for researchers studying global disparities.^[7] The primary purpose of the PWT is to facilitate the analysis of economic growth, income levels, and productivity differences between countries over extended periods.^[7] It supports investigations into living standards, productive capacity, and the drivers of economic development by offering standardized metrics that allow for consistent cross-country and intertemporal assessments.^[7] For instance, economists use the PWT to examine convergence in per capita incomes or the impact of policy reforms on productivity, relying on its emphasis on relative levels to draw robust conclusions.^[7] In terms of scope, the latest version of the PWT (version 11.0) covers 185 countries from 1950 to 2023, providing a broad temporal and geographical foundation for global economic research.^[8] This extensive coverage underscores its role in standardizing disparate national accounts data into a comparable format, enabling users to track long-term trends without the distortions of varying accounting practices or inflation.^[7] By prioritizing relative indicators, the database highlights patterns in economic performance that inform policy decisions and academic studies worldwide.^[7]

Key Variables and Indicators

The Penn World Table (PWT) provides a suite of core economic metrics designed to facilitate cross-country and intertemporal comparisons of economic performance, with all real variables expressed in international dollars benchmarked to 2021 United States dollars for enhanced comparability.^[5] These indicators draw from national accounts and international benchmarks, enabling researchers to assess levels and growth in output, inputs, and productivity without the distortions of nominal exchange rates. Purchasing power parity (PPP) adjustments underpin these variables, allowing for consistent valuation across economies (detailed in the Methodology section).^[2] Among the primary output measures, rgdpo (real GDP per capita on the expenditure side) captures living standards by valuing household consumption, government spending, and investment at PPP, derived from aggregated national accounts data adjusted for price levels.^[2] Similarly, rgdpna (output-side real GDP) quantifies total economic production in volume terms, focusing on value added across sectors and using growth rates from national accounts extrapolated via PPP benchmarks.^[2] For consumption, cgdpo represents real gross domestic product on the output side at current PPPs, providing a measure of productive capacity adjusted for international price differences, though it emphasizes aggregate output rather than final household use.^[2] Input indicators include labor measures such as emp (total employment, in persons engaged) and hc (human capital index), where the latter proxies workforce quality based on educational attainment data from sources like Barro-Lee datasets, weighted by returns to schooling.^[2] Capital inputs are represented by ck (capital stock), estimated from cumulative investment flows by asset type (e.g., machinery and structures) at PPP values, serving as a key factor in production function analyses.^[2] Investment dynamics are tracked via ci (share of gross capital formation in current PPPs on the expenditure side), indicating the proportion of output devoted to expanding productive capacity.^[2] A distinctive feature of the PWT is its emphasis on productivity metrics, particularly rtfpna (relative total factor productivity on the output side), which gauges efficiency in combining capital and labor to produce output, expressed relative to the United States benchmark and derived from residual growth after accounting for input changes.^[2] This indicator highlights structural differences in economic efficiency across countries, supporting analyses of convergence and technological progress. For instance, in recent data, rtfpna levels vary widely, with advanced economies often exceeding 1.0 (U.S. = 1) while many developing nations remain below 0.5, underscoring global productivity gaps.^[7]

History

Origins and Early Development

The Penn World Table (PWT) originated in the 1970s at the University of Pennsylvania, where economists Irving B. Kravis, Robert Summers, and Alan Heston developed it as an extension of their work on international economic comparisons.^[9] The project's name reflects its institutional home at the time, and the trio's collaboration built directly on the International Comparison Program (ICP), which they initiated in 1968 under the auspices of the United Nations to produce reliable cross-country measures of economic output.^[10] This foundational effort addressed a critical gap in global economics: the inadequacy of market exchange rates for comparing real incomes and living standards across nations, which often distorted assessments due to fluctuations in currency values and trade barriers.^[11] Instead, the PWT emphasized purchasing power parities (PPPs) to convert national accounts into a common, comparable framework, enabling more accurate evaluations of productivity and welfare.^[12] The first major output linked to the PWT came from Phase III of the ICP, detailed in a 1978 publication by Kravis, Heston, and Summers, which provided benchmark PPP estimates for gross domestic product (GDP) based on reference years 1970 and 1975.^[13] This release covered approximately 10 countries for the 1970 benchmark and 34 countries for 1975, focusing on detailed price and quantity data for consumption, investment, and government expenditure to derive real GDP per capita in international dollars.^[14] These benchmarks represented the initial dataset for the PWT, highlighting disparities in economic performance; for instance, they revealed that PPP-adjusted incomes were substantially higher than exchange-rate conversions for many developing economies, underscoring the method's value for policy analysis.^[15] In 1980, Summers, Kravis, and Heston formalized the PWT with its Mark 1 version, expanding the 1978 ICP results into a time-series dataset spanning 1950 to 1977 for the 34 Phase III countries.^[16] This iteration introduced methods to estimate PPPs for non-benchmark years through extrapolation, using national accounts growth rates to project real output changes while holding benchmark prices constant, thus creating a continuous panel for cross-country growth studies.^[17] During the early 1980s, further refinements incorporated additional ICP phases, such as Phase IV (1980 benchmark), and began applying interpolation techniques between benchmarks to fill data gaps for a broader set of economies, laying the groundwork for wider adoption in empirical research.^[18] These developments in the pre-1990 era established the PWT as a cornerstone for international comparisons, with subsequent institutional shifts occurring after 1990.^[19]

Institutional Evolution and Major Releases

In the 1990s, the Penn World Table (PWT) began incorporating data from international benchmarks coordinated by organizations such as the OECD and the World Bank through the International Comparison Program (ICP), enhancing its global comparability while still primarily maintained at the University of Pennsylvania.^[14] This period marked a shift toward broader institutional collaboration for purchasing power parity (PPP) estimates, building on the ICP's expansion from 60 countries in 1980 (Phase IV) to 115 in 1993 (Phase VI), and further to 146 in 2005.^[18] By the early 2010s, the project transitioned to joint leadership by Robert C. Feenstra at the University of California, Davis, and Robert Inklaar and Marcel P. Timmer at the University of Groningen's Groningen Growth and Development Centre (GGDC), following contributions from Alan Heston at the University of Pennsylvania, with version 8.0 in 2013 representing the first major release under the new leadership.^[20]^[4] Key milestones in PWT releases reflect ongoing refinements to coverage and methodology. Version 5.6, released in 1991, expanded the dataset to 152 countries and territories for 1950–1992, incorporating updated national accounts and more detailed expenditure categories for improved international comparisons.^[21]^[19] PWT 6.1, issued in 2002 (with data through 1999), refined PPP calculations by integrating revised ICP benchmarks from 1993 and addressing inconsistencies in price data aggregation, resulting in more stable growth rate estimates across revisions.^[22]^[23] Version 7.0, released in 2011 (covering 1950–2009), introduced comprehensive capital stock estimates derived from perpetual inventory methods, which helped mitigate upward biases in earlier growth rates for developing economies by applying productivity adjustments based on capital-labor ratios.^[24]^[25]^[26] Subsequent releases under GGDC's co-stewardship with UC Davis further advanced the dataset's scope and integration. PWT 8.0 (2013) incorporated multi-year ICP benchmarks from 1970 to 2005, enabling consistent temporal chaining of PPPs and reducing distortions from single-benchmark extrapolations.^[27]^[4] Version 9.0 (2016, extending to 2014) added a human capital index based on years of schooling and returns to education, allowing researchers to account for labor quality in productivity analyses.^[28]^[29] PWT 10.0, released in January 2021, covered 183 countries from 1950 to 2019, incorporating the latest ICP 2017 results for refined PPP updates.^[30]^[8] PWT 11.0, released on October 7, 2025, extended coverage to 185 countries through 2023, integrating updated national accounts and the most recent ICP benchmarks for enhanced estimates of comparative price levels and productivity growth.^[1] Since 2013, with PWT 8.0, GGDC has served as co-maintainer with UC Davis, issuing updates that align with periodic ICP benchmarks—typically every three to five years—to ensure timely integration of new price and expenditure data, while maintaining backward compatibility for long-term research series.^[20] These revisions, such as those in version 7.0, have notably corrected overestimations of growth in low-income countries from prior extrapolations, improving the reliability of cross-country convergence studies.^[25]^[26]

Methodology

Data Sources and Collection

The Penn World Table (PWT) relies on national accounts data as its primary raw input for core economic variables, including gross domestic product (GDP), private consumption, government consumption, gross fixed capital formation (investment), and trade balances. These data are sourced directly from official national statistical agencies and compiled internationally through databases such as the United Nations Statistics Division's National Accounts Main Aggregates Database, which provides annual series in current and constant local prices, exchange rates, and population estimates. For instance, GDP and its expenditure components are drawn from standardized national accounts frameworks to capture volume growth and price changes over time. In PWT 11.0, official Chinese national accounts data are used from 1952 onward, replacing adjusted estimates to enhance reliability.^[31]^[32]^[33]^[5] To enable cross-country price comparisons, the PWT incorporates benchmark price and expenditure data from the World Bank's International Comparison Program (ICP), which has conducted global surveys every 3 to 6 years since 1970, progressively expanding coverage to nearly 200 countries in recent cycles. The PWT aggregates data from multiple ICP benchmarks, such as the 2011 cycle (covering 199 countries), the 2017 cycle (covering 201 economies, revised to 176), and the 2021 cycle (covering 196 countries), selecting and adjusting subsets for consistency with national accounts while excluding less reliable regional or partial surveys. This collection process involves harmonizing expenditure categories across benchmarks to align with GDP components, ensuring the data support real output measures at international prices. PWT 11.0 integrates these cycles for enhanced coverage.^[34] For years without ICP benchmarks, the PWT extrapolates real volumes and implicit prices from the nearest reference benchmark using growth rates and deflators derived from national accounts data, preserving relative levels while allowing for domestic inflation differentials. This temporal bridging maintains continuity in time series spanning 1950 to the present for over 180 countries.^[4] Data gaps, particularly in national accounts for smaller or less-developed economies, are addressed through imputation techniques, such as interpolating missing values between available observations or applying regional averages from comparable countries. For example, incomplete investment series in some African nations may be estimated using sub-Saharan averages adjusted for GDP per capita, with flags indicating imputed data to alert users. These methods minimize biases while maximizing coverage, though they introduce some uncertainty in low-data environments.^[32]^[35]

Purchasing Power Parity Adjustments

Purchasing power parity (PPP) adjustments in the Penn World Table (PWT) enable the conversion of nominal economic values from national currencies into internationally comparable real terms, addressing distortions caused by exchange rate fluctuations by using price relatives across countries for a standardized basket of goods and services.^[4] This approach ensures that comparisons of economic output, such as GDP, reflect differences in purchasing power rather than nominal currency values, facilitating accurate cross-country analysis of living standards and productivity.^[36] The PWT employs the Geary-Khamis (G-K) method, a multilateral aggregation technique, to derive PPP exchange rates from benchmark data collected through the International Comparison Program (ICP).^[4] In this process, ICP price data for basic headings (e.g., categories like food or housing) are first aggregated using the GEKS (Gini-Eltetö-Köves-Szulc) index to ensure transitivity across countries, then combined into overall GDP PPPs via the G-K method, which calculates quantity-weighted average reference prices.^[4] The resulting PPPs express values in international dollars, a hypothetical unit representing the purchasing power of the U.S. dollar in a reference year (2021 in PWT 11.0).^[36]^[6] To extend these benchmark PPPs across non-benchmark years, the PWT uses spatio-temporal indexing, linking multiple ICP benchmarks (such as those from 1970, 1993, 2003, 2005, 2011, 2017, and 2021) through interpolation and extrapolation based on national accounts data.^[4] Between benchmarks, price changes are interpolated using relative national price indices; beyond the latest benchmark, extrapolation relies on GDP deflators to adjust for inflation, maintaining consistency in real volume comparisons over time.^[36] This temporal linking preserves the multilateral nature of the PPPs while incorporating country-specific price movements.^[4] The core formula for PPP adjustment derives the PPP exchange rate for a country j and category q as the ratio of local expenditure to expenditure at reference prices:

PPP_{jq} = \frac{\sum_i p_{ji} q_{ji}}{\sum_i \pi_i q_{ji}}

where p_{ji} are local prices, \pi_i are G-K reference prices, and q_{ji} are quantities in country j.^[4] Real GDP is then computed by dividing nominal GDP by this PPP rate:

\text{Real GDP}_j = \frac{\text{Nominal GDP}_j}{PPP_{jq}}

yielding output in international dollars.^[4] This derivation ensures additivity, allowing real GDP components (e.g., consumption, investment) to sum to total real GDP.^[36]

Productivity and Capital Stock Calculations

The capital stock in the Penn World Table (PWT), denoted as ck, is estimated using the perpetual inventory method (PIM), which accumulates past investments while accounting for depreciation. This approach begins with an initial capital stock benchmark, typically derived from 1950 data for many countries or approximated using a capital-output ratio for earlier periods, and extends forward through the series. Investments are drawn from national accounts data on gross fixed capital formation, disaggregated into asset types such as structures, machinery, transport equipment, computers, communication equipment, and software, with shares based on nonresidential (cn) and residential (ci) components where applicable. The PIM applies asset-specific geometric depreciation rates, ranging from 2% for structures to 31.5% for computers and software, held constant across countries and sourced from U.S. Bureau of Economic Analysis benchmarks. Investments are adjusted to purchasing power parity (PPP) terms using relative price levels for equipment and structures, ensuring international comparability. The core equation is:

ck_{a,i,t} = (1 - \delta_a) \cdot ck_{a,i,t-1} + I_{a,i,t}

where ck_{a,i,t} is the capital stock for asset a in country i at time t, \delta_a is the depreciation rate for asset a, and I_{a,i,t} is the PPP-adjusted investment in that asset. Aggregate capital stock is then obtained by summing across assets, weighted by their shares in total investment at current prices.^[4] Total factor productivity (TFP) in the PWT, specifically the relative TFP level at constant national prices (rtfpna), is computed as the residual from a Cobb-Douglas production function that decomposes output into contributions from capital, labor, and efficiency. The function assumes:

Y = A \cdot K^{\alpha} \cdot (L \cdot hc)^{1 - \alpha}

where Y is real gross domestic product at constant national prices (rgdpna), measuring output in volume terms using domestic deflators, A is TFP (rtfpna), K is the capital stock (ck), L is the number of persons engaged in employment (emp), hc is the human capital index per person, and \alpha is the output elasticity of capital (typically around 0.3 to 0.4, though estimated as country- and time-specific based on the complement of the labor income share). Solving for TFP yields:

rtfpna = \frac{rgdpna}{ck^{\alpha} \cdot (emp \cdot hc)^{1 - \alpha}}

This residual measures the efficiency with which inputs are combined to produce output, normalized relative to the United States in a base year. The calculation incorporates PPP adjustments to ensure cross-country consistency, with growth rates often derived using Törnqvist indices for inputs to handle varying elasticities.^[37] Human capital adjustment in the PWT (hc) augments raw labor input by accounting for educational attainment, using average years of schooling for the population aged 15 and older as a proxy. The index is constructed via a piecewise linear Mincerian earnings function that applies marginal returns to education by attainment level: 13.4% for the first four years, 10.1% for the next four years, and 6.8% for years beyond eight. These returns are drawn from meta-analysis estimates in Psacharopoulos (1994). Schooling data primarily come from the Barro-Lee dataset (version 2.0, covering 1950–2010 at five-year intervals for up to 146 countries), supplemented by Cohen and Soto (2014) for more recent or alternative estimates in 55 countries, with selection guided by consistency checks against UNESCO and other benchmarks. The resulting hc is multiplied by employment (emp) to yield effective labor input, enhancing the TFP residual's accuracy in capturing skill-adjusted productivity differences. For example, in high-education economies like those in Western Europe, hc values exceed 3.0, reflecting substantial quality adjustments over raw hours or workers.^[29]

Applications and Impact

Use in Economic Research

The Penn World Table (PWT) has been extensively used in empirical tests of the Solow growth model, which posits that long-run economic growth stems from exogenous technological progress while factor accumulation drives transitional dynamics. Researchers employ PWT data on real GDP, capital stocks, and labor inputs to estimate model parameters, such as the capital share and convergence rates, often augmenting the framework with human capital variables. For instance, replications of Mankiw, Romer, and Weil's (1992) augmented Solow specifications using various PWT versions reveal consistent positive effects of investment and schooling on growth, though revisions across versions can alter coefficient magnitudes and the validity of Solow restrictions.^[38] In convergence analyses, PWT facilitates β-convergence studies, where lower initial income levels predict faster subsequent growth due to diminishing returns. Econometric regressions on PWT GDP per capita series across countries typically yield negative and significant β coefficients, supporting conditional convergence when controlling for factors like investment rates, though unconditional estimates vary by sample period and PPP methodology. Additionally, PWT's total factor productivity (TFP) and input measures enable decomposition of aggregate growth into contributions from capital accumulation, labor quantity/quality, and TFP residuals, revealing that factor accumulation often accounts for a larger share of growth in developing economies compared to advanced ones.^[39]^[37] Notable applications include Barro and Lee’s human capital regressions, where PWT integrates their average years of schooling data to construct human capital indices for augmented growth models, enhancing explanations of income differences. Similarly, Paul Romer’s seminal work on endogenous growth theory draws on PWT GDP series to illustrate cross-country income variations and the role of knowledge spillovers beyond Solow residuals.^[29]^[40] PWT data have profoundly shaped the growth literature, with core publications garnering over 7,000 citations and enabling thousands of annual references in empirical studies. Revisions, such as those in PWT 7.0, prompted reassessments of high-growth episodes by adjusting PPP-based growth rates, influencing debates on the drivers of rapid expansions in emerging markets. However, researchers highlight limitations, including sensitivity to PPP benchmarks that can distort relative income levels and interpolation errors in non-benchmark years that amplify volatility in growth estimates.^[41]^[38]^[4]

Role in Policy and International Comparisons

The Penn World Table (PWT) plays a pivotal role in informing policy decisions at international organizations by providing standardized purchasing power parity (PPP)-adjusted data on economic output and productivity, which underpins analyses of global inequality. For instance, the International Monetary Fund (IMF) incorporates PWT data into its World Economic Outlook reports to assess cross-country growth and inequality trends, enabling more accurate evaluations of disparities in living standards. Similarly, the World Bank's Human Capital Index relies on PWT estimates of real GDP per capita in PPP terms to adjust for cost-of-living differences when measuring human development outcomes. These applications help shape reports on global economic imbalances, guiding resource allocation and development strategies.^[42]^[43]^[44] In international comparisons, PWT facilitates rankings of countries by PPP-adjusted GDP per capita, highlighting stark contrasts in economic performance; for example, Singapore consistently ranks among the top economies with levels exceeding $100,000 in recent years, while conflict-affected nations like Yemen or Afghanistan appear at the bottom with figures below $5,000. This dataset also tracks long-term convergence trends, revealing how emerging economies have narrowed productivity gaps with advanced ones since 1950, informing debates on global economic catch-up. Such comparisons are essential for benchmarking national performance against international standards, though they emphasize relative levels rather than absolute poverty metrics.^[7]^[45]^[46] PWT's productivity data has been instrumental in specific policy contexts, such as assessments of European Union (EU) enlargement. During the 2004 and 2007 expansions, analyses drawing on PWT total factor productivity estimates demonstrated how integration boosted output per worker in new member states, supporting evaluations of economic cohesion and structural reforms. Likewise, for Sustainable Development Goal (SDG) 8 on decent work and economic growth, PWT contributes to monitoring progress through indicators of labor productivity and per capita growth, as utilized in platforms tracking global advancements toward inclusive economic expansion.^[47]^[48]^[49] Despite its influence, critiques highlight potential drawbacks in policy applications, particularly the over-reliance on periodic International Comparison Program (ICP) benchmarks, which can introduce biases into non-benchmark year extrapolations and skew aid allocations toward countries with favorable relative rankings. Studies have noted variability in PWT growth estimates across versions, potentially leading to misinformed decisions on development assistance if revisions alter perceived needs. These concerns underscore the need for cautious interpretation in high-stakes policy contexts.^[4]^[50]^[51]

Current Version and Access

Features of PWT 11.0

The Penn World Table (PWT) version 11.0, released on October 7, 2025, by the Groningen Growth and Development Centre (GGDC), extends coverage to 185 countries over the period from 1950 to 2023, providing comprehensive data on relative levels of income, output, inputs, and productivity. This release incorporates significant methodological advancements, building on the framework of previous versions while addressing gaps in data availability and accuracy. Key among these is the integration of the 2021 International Comparison Program (ICP) benchmark from the World Bank, which refines purchasing power parity (PPP) estimates by incorporating updated comparative price data across a broader set of goods and services, thereby improving cross-country comparability of real GDP and consumption levels.^[1]^[52] A major enhancement in PWT 11.0 is the extension and refinement of the total factor productivity (TFP) series. Coverage expansions in this version include the addition of data for the years 2020–2023, drawn from preliminary national accounts released by international agencies, enabling timely assessments of post-pandemic recovery trajectories. This release also updates data for China to use official national accounts series rather than previously adjusted Maddison/Wu series.^[52]

Availability and Updates

The Penn World Table (PWT) data is freely available for download from the Groningen Growth and Development Centre (GGDC) at the University of Groningen, hosted on the DataverseNL platform with a persistent DOI for each release.^[7]^[53] Datasets are provided in Excel (.xlsx) and Stata (.dta) formats, enabling users to select individual files such as national accounts aggregates or capital details, or perform bulk downloads for comprehensive analysis.^[54] Programmatic access is supported through the Dataverse Data Access API, allowing automated queries and retrieval for large-scale research applications.^[55] Accompanying documentation includes detailed user guides explaining variable definitions and usage, as well as release notes outlining methodological updates and data revisions in each version.^[20] The PWT follows an update cycle aligned with the International Comparison Program (ICP) benchmarks, which are periodically conducted under the auspices of the World Bank to generate updated purchasing power parities (PPPs). Major releases typically occur every few years following ICP data availability, incorporating the latest PPP estimates and national accounts revisions to extend time series coverage; for instance, PWT 11.0, released on October 7, 2025, integrates ICP 2017 revisions and national accounts data through 2023.^[52] This alignment ensures consistency with global standards, while interim updates—such as PWT 10.01 in 2023—address corrections or methodological refinements without adding new annual observations, including adjustments for significant events like the post-2020 COVID-19 pandemic impacts on economic data. Release announcements and downloads are managed directly through the GGDC website, with historical versions archived for reproducibility in longitudinal studies.^[56] Maintenance of the PWT is led by the GGDC in collaboration with key researchers, including Robert C. Feenstra at the University of California, Davis, and Robert Inklaar and Marcel P. Timmer at the University of Groningen, who integrate inputs from international sources such as the World Bank's ICP for PPP benchmarks.^[7]^[20] The process relies on official national accounts data from member countries and organizations, ensuring rigorous validation before public release. User feedback mechanisms are facilitated through direct contact with the GGDC team via email or the project's official channels, contributing to refinements in subsequent versions. Looking ahead, the PWT team continues to evolve the database by incorporating emerging national accounts data and ICP cycles, with the next major release anticipated after the next World Bank ICP results are fully processed, potentially extending coverage beyond 2023.^[57] This iterative approach maintains the PWT's role as a dynamic resource for cross-country economic comparisons.^[8]

References

[1]
PWT 11.0
### Summary of ICP Benchmarks and Related Details in PWT 11.0
[2]
PWT Documentation
### Summary of Data Sources and Methods for Penn World Table (PWT)
[3]
[PDF] Description of PWT 7.0 and 7.1 (July, 2012)
The Penn World Table grew out of the United Nations International. Comparison Programme (ICP) that was jointly directed by Irving Kravis at Penn through the ...Missing: addressed | Show results with:addressed
[4]
[PDF] The Next Generation of the Penn World Table
For over four decades, the Penn World Table (PWT) has been a standard source of data on real GDP across countries.
[5]
https://www.rug.nl/ggdc/blog/penn-world-table-version-11-0-is-published
[6]
https://doi.org/10.34894/FABVLR
[7]
PWT 11.0 | Penn World Table | Groningen Growth and Development ...
Oct 7, 2025 · PWT version 11.0 is a database with information on relative levels of income, output, input and productivity, covering 185 countries between ...PWT 10.0 · PWT News · PWT Documentation · Historical Development
[8]
PWT News | Penn World Table
Oct 7, 2025 · Today, we have launched version 10.0 of the Penn World Table. This version of the database covers 183 countries and the years from 1950 to 2019.
[9]
[PDF] What is new in PWT 10.0?
Jan 28, 2021 · The release of the Penn World Table version 10.0 is the fifth release since the switch to the 'Next. Generation of the Penn World Table', see ...Missing: key | Show results with:key
[10]
[PDF] User Guide to PWT 10.0 data files
This document discusses how we use National Accounts from official sources for the period 1950–1969 for the Netherlands and the United States. We have since ...
[11]
[PDF] pwt10: Penn World Table (Version 10.x)
rgdpna Real GDP at constant 2017 national prices (in million 2017 USD). rconna Real consumption at constant 2017 national prices (in million 2017 USD).Missing: list ci
[12]
Penn World Table | The Center for International Data - UC Davis
Aug 31, 2022 · University of Groningen. Version 7.3 of the Penn World Table is available at: ... This site is officially grown in SiteFarm.
[13]
[PDF] Deaton Welcome to the 50th anniversary of the world
May 23, 2018 · The ICP began in 1968 with Irving Kravis, Alan Heston, and. Robert Summers from the University of Pennsylvania, and Zoltan Kennessy from the ...
[14]
[PDF] the international comparison program
In the first three Phases of the ICP. (1970, 1973, and 1975) the same team at the University of Pennsylvania, in close collaboration with the U.N. Statistical ...<|control11|><|separator|>
[15]
Irving B. Kravis, Alan Heston, and Robert Summers. International ...
International Comparisons of Real Product and Purchasing Power. Pp. ix, 264. Baltimore, MD: Johns Hopkins University Press, 1978. $20.00. Donald L. Huddle ...
[16]
[PDF] Introduction to "International and Interarea Comparisons of Income ...
Kravis, Irving B., Alan Heston, and Robert Summers. 1978. International comparisons of real product and purchasing powel: UN International Comparison ...
[17]
International Comparison Program (ICP) - History - World Bank
1975: ICP Phase III. For 34 economies (reference year 1975). First ... 1988: The University of Pennsylvania introduces Penn World Table and extends ...Missing: 1978 | Show results with:1978<|control11|><|separator|>
[18]
[PDF] World Product and Income: International Comparisons of Real Gross ...
International comparisons of real product and cur- rency purchasing ... Kravis, Heston, Summers (1978a). Page 14. WORLD PRODUCT AND INCOME. Thus the ...
[19]
International Comparisons Of Real Product And Its Composition
Robert Summers & Irving B. Kravis & Alan Heston, 1980. "International Comparisons Of Real Product And Its Composition: 1950–77," Review of Income and Wealth ...
[20]
[PDF] The World Distribution of Well-being Dissected
... Penn World Table (Mark 5.6). a large space-time system of national accounts that has been under development since 1980, when the Mark 1 version appeared in ...Missing: history | Show results with:history
[21]
The Chronological Table on the Evolution of the ICP - World Bank
1975: ICP Phase III. For 34 economies (reference year 1975). First official ... 1988: The University of Pennsylvania introduces Penn World Table and ...
[22]
[PDF] The Penn World Table (Mark 5): An Expanded Set of International ...
The Penn World Table displays a set of national accounts economic time series covering many countries. Its expenditure entries are denominated in a common set ...<|control11|><|separator|>
[23]
PWT Documentation | Penn World Table
Jan 14, 2021 · Until version 7.1, the Penn World Table was compiled by researchers at the University of Pennsylvania, including Kravis, Summers, Heston and ...
[24]
PWT 5.6 | Groningen Growth and Development Centre
Sep 12, 2016 · PWT 5.6. PWT 5.6 includes 152 countries and territories, for the period ... Alan Heston, Robert Summers and Bettina Aten, Penn World Table ...Missing: 1991 expanded coverage
[25]
https://www.rug.nl/ggdc/docs/pwt-7-web2011a.pdf
[26]
[PDF] NBER WORKING PAPER SERIES IS NEWER BETTER? PENN ...
This paper sheds light on two problems in the Penn World Table (PWT) GDP estimates. First, we show that these estimates vary substantially across different ...
[27]
PWT 7.0 | Groningen Growth and Development Centre
Sep 12, 2016 · PWT 7.0. PWT 7.0 includes 189 countries and territories, for the period 1950-2009, and uses 2005 ... Alan Heston, Robert Summers and Bettina Aten, ...Missing: capital estimates
[28]
[PDF] Description of PWT 7.0 (June 3, 2011)
Jun 3, 2011 · The method adopted in PWT 7.0 was to apply a common productivity adjustment to all of the regions on the basis of rough capital per worker data ...
[29]
Is Newer Better? Penn World Table Revisions and the Growth ...
Versions 6.1 and 6.2 of Penn World Tables (PWT) have essentially the same methodology and the same underlying data, but report significantly different growth ...
[30]
PWT 8.0 | Groningen Growth and Development Centre
Jan 9, 2017 · ICP benchmark data (1970, 1975, 1980, 1985, 1996), PPPs and expenditure at the most detailed level for publicly available benchmark years.Missing: multi- integration
[31]
PWT 9.0 | Groningen Growth and Development Centre
Jan 11, 2021 · PWT version 9.0 is a database with information on relative levels of income, output, input and productivity, covering 182 countries between 1950 and 2014.
[32]
[PDF] Human capital in PWT 9.0
Following a common approach in the literature (e.g. Caselli, 2005), PWT version 8 introduced a human capital index based on the average years of schooling ...
[33]
PWT 10.0 | Groningen Growth and Development Centre
Sep 26, 2024 · PWT version 10.0 is a database with information on relative levels of income, output, input and productivity, covering 183 countries between ...
[34]
https://www.rug.nl/ggdc/productivity/pwt/pwt-releases/pwt100
[35]
[PDF] User Guide to PWT 9.0 data files
This file, in Excel or Stata format, is the Penn World Table and includes the main variables. In its variables and their construction, this data file closely ...
[36]
https://www.rug.nl/ggdc/docs/pwt_80_user_guide.pdf
[37]
https://www.rug.nl/ggdc/docs/capital_labor_and_tfp_in_pwt80.pdf
[38]
[PDF] Technical Guide to PWT8.0
The variable pl_c_gk is the relative price level of household consumption, computed using the GK index number procedure, where the GDP price level of the USA=1 ...Missing: key | Show results with:key
[39]
[PDF] PWT 8.0 – a user guide
To illustrate the main concepts fromPWT8.0, Table 1 compares GDP per capita and productivity in China and the United States in 2005. The first row shows. GDP ...Missing: key | Show results with:key
[40]
[PDF] Capital, labor and TFP in PWT8.0
Abstract: This paper introduces, documents and discusses the new input and total factor productivity (TFP) measures introduced in Penn World Table (PWT) version ...<|control11|><|separator|>
[41]
Is Newer Better? Penn World Table Revisions and Their Impact on ...
Oct 22, 2009 · This paper sheds light on two problems in the Penn World Table (PWT) GDP estimates. First, we show that these estimates vary substantially across different ...
[42]
Traditional convergence tests with Penn World Table 9.0
This paper provides answers to these questions by studying unconditional beta-convergenceand sigma-convergence of labour productivity with the Penn World Table ...
[43]
The Origins of Endogenous Growth - American Economic Association
1The data here are taken from version IV of the Penn World Table. The income measure is. RGDP2. See Summers and Heston (1988) for details. Page 3. Paul M. Romer ...
[44]
‪Robert Inklaar‬ - ‪Google Scholar‬
The next generation of the Penn World Table. RC Feenstra, R Inklaar, M Timmer. American Economic Review 105 (10), 3150-3182, 2015. 7602, 2015 ; Rebasing'Maddison ...
[45]
[PDF] Annex Table 2.1.1. Data Sources
The primary data sources for this chapter are the IMF World Economic Outlook database, the Penn World Table (PWT) 10.0 database, the World Input-Output ...
[46]
[PDF] The World Bank Human Capital Index: A Guide
Real GDP per capita adjusted for differences in purchasing power parity is taken from the Penn World Tables (Feenstra, Inklaar, and Timmer 2015), with missing ...
[47]
[PDF] Calculating the human development indices
Correspondence on data from the Penn World Table Version 6.0. University of Pennsylvania, Center for International Comparisons of Production, Income and Prices.<|separator|>
[48]
GDP per capita - Our World in Data
Feenstra et al. – Penn World Table. PWT version 11.0 is a database with information on relative levels of income, output, input and productivity, covering 185 ...Missing: base | Show results with:base
[49]
Recasting international income differences: The next-generation ...
Sep 2, 2013 · The Penn World Table has long been a standard data source for those interested in comparing living standards across countries and explaining differences in ...
[50]
The EU miracle: When 75 million reached high income - CEPR
Jun 6, 2024 · Another measure of productivity, total factor productivity (TFP), as estimated by the Penn World Tables (Feenstra et al. 2015) shows signs of ...
[51]
Productivity: output per hour worked - Our World in Data
Productivity is calculated as GDP divided by the total number of hours worked in the economy. This data is adjusted for inflation and differences in living ...Missing: enlargement | Show results with:enlargement
[52]
Measuring progress towards the Sustainable Development Goals
Jul 18, 2023 · This free, open-access information tracks global progress towards the SDGs and allows people worldwide to hold their governments accountable for achieving the ...Missing: Penn | Show results with:Penn
[53]
Is newer better? Penn World Table Revisions and their impact on ...
The pioneering work of Irving Kravis, Alan Heston, and Robert Summers, which led to the Penn World Table data, was aimed at converting national measures of GDP ...Missing: origins | Show results with:origins
[54]
Is the Penn World Table Credible? - Capital As Power
Oct 17, 2021 · Is the Penn World Table Credible? October 17, 2021. Originally ... Extrapolate backwards from that recent PPP base-year estimate using ...
[55]
Penn World Table version 11.0 is published
Oct 7, 2025 · We incorporate the newest data on comparative prices and provide estimates of income and productivity growth and comparative levels.
[56]
https://www.rug.nl/ggdc/productivity/pwt/earlier-releases?lang=en
[57]
Penn World Table version 11.0 - DataverseNL
Oct 8, 2025 · PWT version 11.0 is a database with information on relative levels of income, output, input and productivity, covering 185 countries between ...
[58]
Penn World Table version 10.01 - DataverseNL
PWT version 10.01 is a database with information on relative levels of income, output, input and productivity, covering 183 countries between 1950 and 2019.
[59]
Earlier Releases | Penn World Table
Oct 7, 2025 · On the pages below, you'll find access to earlier releases of the Penn World Table: PWT 10.01 · PWT 10.0 · PWT 9.1 · PWT 9.0 · PWT 8.1 · PWT 8.0.
[60]
Penn World Table (@PennWorldTable) / Posts / X
Version 11.0 of the Penn World Table has just been released. You can ... This new version includes new data from ICP ( worldbank.org/en/programs/icp) ...