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PRWP

Reproducibility package for Global Inequality And Economic Growth: The Three Decades Before Covid-19 And Three Decades After

2025
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Reference ID
RR_WLD_2025_296
DOI
https://doi.org/10.60572/6dym-ct57
Author(s)
Diana C. Garcia Rojas, Nishant Yonzan, Christoph Lakner
Collections
World Bank Policy Research Working Papers
Metadata
JSON
Created on
Apr 08, 2025
Last modified
Apr 08, 2025
  • Project Description
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  • Overview
  • Reproducibility Package
  • Description
  • Scope and coverage
  • Disclaimer
  • Access and rights
  • Contacts
  • Information on metadata
  • Citation
  • Overview

    Abstract

    Global income inequality captures income differences among all individuals around the world. Global inequality around the world increased from 1820 to 1990 as incomes in richer countries grew faster than incomes in relatively poorer countries. Howeve, these trends have been reversed over the three decades starting in 1990. Inequality among all citizens of the world decreased as populous and relatively poorer countries, in particular China, reduced the income gap with richer parts of the world. rowth in average incomes played a critical role in this reduction, with differences within countries contributing relatively little. The Covid-19 pandemic abruptly halted the reduction in global income inequality and was responsible for the largest ncrease in global income inequality in at least three decades. The future of global inequality largely depends on how incomes grow in various parts of the world. If the trends of the last three decades continue, inequality may increase as growth in hose countries that drove the reduction in inequality now contributes to increasing inequality, since these countries are in the upper part of the global distribution. However, if poorer countries today grow faster than their richer peers, inequalitglobally could continue to fall. Climate adaptation and mitigation challenges will play an increasing role in shaping country-level growth trends and thus the changes in global income inequality.

    Reproducibility Package

    Scripts
    Readme Get Reproducibility Package
    Link: https://reproducibility.worldbank.org/index.php/catalog/264/download/780/README.pdf
    Reproducibility package for Global Inequality And Economic Growth: The Three Decades Before Covid-19 And Three Decades After
    Title
    Reproducibility package for Global Inequality And Economic Growth: The Three Decades Before Covid-19 And Three Decades After
    Date
    2025-04
    Dependencies
    Stata dependencies are listed in the ado folder.
    Notes
    Computational reproducibility verified by Development Impact (DIME) Analytics team, World Bank.
    Source code repository
    Repository name URI
    Reproducible Research Repository (World Bank) https://reproducibility.worldbank.org
    Software
    Stata
    Name
    Stata
    Version
    18 MP
    Excel
    Name
    Excel
    Version
    Microsoft Excel for Microsoft 365 MSO

    Reproducibility

    Technology environment

    – OS: Windows 10 Enterprise 22H2
    – Processor: Intel(R) Xeon(R) Gold 6132 CPU @ 2.60GHz 2.60 GHz (2 processors)
    – Memory available: 128 GB
    – Software version: Stata 18.0 MP

    Technology requirements

    The code takes 1 day to run without the appendix, and 3 days to run with appendix.

    Reproduction instructions

    To run the code, the user needs to:

    1. Open the 00-Master do file.
    2. Modify the working directory in the script to match their local setup and run the code.

    Data

    Datasets
    GDP projections under different Shared Socioeconomic Pathways
    Name
    GDP projections under different Shared Socioeconomic Pathways
    Note
    Source: International Institute for Applied Systems Analysis (IIASA). IIASA SSP Scenario Explorer 3.1.0. Location: 02-rawdata/Growth/ssp.dta. Access year: 2024.
    Access policy
    Data is publicly available and included in the reproducibility package
    License
    Creative Commons Attribution-NonCommercial 4.0 International License
    License URL
    https://iiasa.ac.at/terms-of-use
    Data URL
    https://ssp-extensions.apps.ece.iiasa.ac.at/download
    Growth projections
    Name
    Growth projections
    Note
    Source: World Bank and International Monetary Fund. The file was created by the authors using the following sources: World Bank, Growth projections from the Global Economic Prospects (June 2024), original filename: projections_global_2050.dta; World Bank, Macro and Poverty Outlooks (April 2024); International Monetary Fund, World Economic Outlook (April 2024). The dataset includes the following variables: country code, region, year, source (referring to one of the sources listed above), GDP per capita growth pre-COVID, and baseline GDP per capita growth. Location: 02-rawdata/Growth/GDP_GEP202406.dta. Access year: 2024.
    Access policy
    Data is publicly available and included in the reproducibility package
    License URL
    https://www.worldbank.org/en/about/legal/terms-of-use-for-datasets, https://www.imf.org/en/About/copyright-and-terms
    Data URL
    https://reproducibility.worldbank.org/index.php/catalog/250/related-materials, https://www.worldbank.org/en/publication/macro-poverty-outlook, https://www.imf.org/en/Publications/WEO/weo-database/2024/April
    World Bank Classification Data
    Name
    World Bank Classification Data
    Note
    Source: World Bank. Global Poverty & Inequality Data team (GPID). Location: 02-rawdat/Other/CLASS_FY24.dta.
    Access policy
    Data is publicly available and included in the reproducibility package
    Data URL
    https://github.com/GPID-WB/Class/blob/master/OutputData/CLASS.dta
    Poverty and Inequality Platform
    Name
    Poverty and Inequality Platform
    Note
    Source: World Bank. Poverty and Inequality Platform (version September 2024). Access year: 2024. Location: 02-rawdata/Other/Population_202409.dta and 02-rawdata/PIP/PIP_countries_202409.dta. Code to consult the data is included in the README file.
    Access policy
    Data is publicly available and included in the reproducibility package
    License
    Creative Commons Attribution 4.0 (CC-BY 4.0)
    License URL
    https://www.worldbank.org/en/about/legal/terms-of-use-for-datasets
    Data URL
    https://pip.worldbank.org/use-pip
    Global Binned Distribution 1990-2024
    Name
    Global Binned Distribution 1990-2024
    Note
    Source: World Bank Data Catalog. Mahler, Daniel Gerszon; Yonzan, Nishant; Lakner, Christoph. 2022.  Location: 02-rawdata/PIP/GlobalDist1000bins_1990_2024_3pr24.dta. 02-rawdata/PIP/GlobalDist1000bins_2024_3pr24.dta (only for 2024). More details available in the README file.
    Access policy
    Data is publicly available and included in the reproducibility package
    License
    Creative Commons Attribution 4.0 (CC-BY 4.0)
    License URL
    https://datacatalog.worldbank.org/int/public-licenses?fragment=cc
    Data URL
    https://datacatalog.worldbank.org/search/dataset/0064304/1000_binned_global_distribution
    Global Welfare Dataset (2022)
    Name
    Global Welfare Dataset (2022)
    Note
    Source: Mahler, Daniel Gerszon; Yonzan, Nishant; Lakner, Christoph. 2022. The Impact of COVID-19 on Global Inequality and Poverty. Policy Research Working Papers;10198. Location: 02-rawdata/PIP/GlobalDist_1000bins_MYLjan25_limitedvars.dta
    Access policy
    Data is publicly available and included in the reproducibility package
    License
    Creative Commons Attribution 4.0 (CC-BY 4.0)
    License URL
    https://www.worldbank.org/en/about/legal/terms-of-use-for-datasets
    Data URL
    https://hdl.handle.net/10986/38114
    Poverty and Shared Prosperity 2016: Poverty Simulations
    Name
    Poverty and Shared Prosperity 2016: Poverty Simulations
    Note
    Source: World Bank’s Poverty and Shared Prosperity 2016, based on the original work by Lakner, Negre and Prydz (2014). Files: `povsim.ado`, `povsim_convex.ado`, `povsim_linear.ado`, `povsim_sfunction.ado`.
    Access policy
    Data is publicly available and included in the reproducibility package
    License
    Creative Commons Attribution 4.0 (CC-BY 4.0)
    License URL
    https://www.worldbank.org/en/about/legal/terms-of-use-for-datasets
    Data URL
    https://www.worldbank.org/en/data/interactive/2016/10/02/poverty-and-shared-prosperity-2016-poverty-simulations
    Data statement

    All data sources are publicly available and included in the reproducibility package.

    Description

    Output
    Global Inequality And Economic Growth: The Three Decades Before Covid-19 And Three Decades After
    Type
    PRWP Working Paper
    Title
    Global Inequality And Economic Growth: The Three Decades Before Covid-19 And Three Decades After
    Description
    Policy Research Working Papers (PRWP)
    Authors
    Author Affiliation Email
    Diana C. Garcia Rojas World Bank dgarciarojas@worldbank.org
    Nishant Yonzan World Bank nyonzan@worldbank.org
    Christoph Lakner World Bank clakner@worldbank.org
    Date of production

    2025-04-07

    Scope and coverage

    Geographic locations
    Location Code
    World WLD
    Keywords
    Global Inequality Economic Growth Shared Socioeconomic Pathways
    Topics
    ID Topic Parent topic ID Vocabulary Vocabulary URI
    D30 General D3 Journal of Economic Literature (JEL)
    D31 Personal Income, Wealth, and Their Distributions D3 Journal of Economic Literature (JEL)
    O40 General O4 Journal of Economic Literature (JEL)

    Disclaimer

    Disclaimer

    The materials in the reproducibility packages are distributed as they were prepared by the staff of the International Bank for Reconstruction and Development/The World Bank. The findings, interpretations, and conclusions expressed in this event do not necessarily reflect the views of the World Bank, the Executive Directors of the World Bank, or the governments they represent. The World Bank does not guarantee the accuracy of the materials included in the reproducibility package.

    Access and rights

    License
    Name URI
    Modified BSD3 https://opensource.org/license/bsd-3-clause/

    Contacts

    Contacts
    Name Affiliation Email
    Diana C. Garcia Rojas World Bank dgarciarojas@worldbank.org
    Reproducibility WBG World Bank reproducibility@worldbank.org

    Information on metadata

    Producers
    Name Abbreviation Affiliation Role
    Reproducibility WBG DIME World Bank - Development Impact Department Verification and preparation of metadata
    Date of Production

    2025-04-07

    Document version

    1

    Citation

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