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How Much Does Reducing Inequality Matter for Global Poverty ?

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  • Lakner,Christoph
  • Mahler,Daniel Gerszon
  • Negre,Mario
  • Prydz,Espen Beer

Abstract

The goals of ending extreme poverty by 2030 and working toward a more equal distribution of income are prominent in international development and agreed upon in the United Nations'Sustainable Development Goals 1 and 10. Using data from 164 countries comprising 97 percent of the world's population, this paper simulates a set of scenarios for global poverty from 2018 to 2030 under different assumptions about growth and inequality. This allows for quantifying the interdependence of the poverty and inequality goals. The paper uses different assumptions about growth incidence curves to model changes in inequality and relies on the Model-based Recursive Partitioning machine-learning algorithm to model how growth in GDP is passed through to growth as observed in household surveys. When holding within-country inequality unchanged and letting GDP per capita grow according to International Monetary Fund forecasts, the simulations suggest that the number of extreme poor (living below $1.90/day) will remain above 550 million in 2030, resulting in a global extreme poverty rate of 6.5 percent. If the Gini index in each country decreases by 1 percent per year, the global poverty rate could reduce to around 5.4 percent in 2030, equivalent to 100 million fewer people living in extreme poverty. Reducing each country's Gini index by 1 percent per year has a larger impact on global poverty than increasing each country's annual growth 1 percentage point above the forecasts, suggesting an important role for inequality on the path to eliminating extreme poverty.

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  • Lakner,Christoph & Mahler,Daniel Gerszon & Negre,Mario & Prydz,Espen Beer, 2019. "How Much Does Reducing Inequality Matter for Global Poverty ?," Policy Research Working Paper Series 8869, The World Bank.
  • Handle: RePEc:wbk:wbrwps:8869
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    1. Ncube, Mthuli & Brixiova, Zuzana & Bicaba, Zorobabel, 2014. "Can Dreams Come True? Eliminating Extreme Poverty in Africa by 2030," IZA Discussion Papers 8120, Institute of Labor Economics (IZA).
    2. Angus Deaton, 2005. "Measuring Poverty in a Growing World (or Measuring Growth in a Poor World)," The Review of Economics and Statistics, MIT Press, vol. 87(1), pages 1-19, February.
    3. Francisco H. G. Ferreira & Shaohua Chen & Andrew Dabalen & Yuri Dikhanov & Nada Hamadeh & Dean Jolliffe & Ambar Narayan & Espen Beer Prydz & Ana Revenga & Prem Sangraula & Umar Serajuddin & Nobuo Yosh, 2016. "A global count of the extreme poor in 2012: data issues, methodology and initial results," The Journal of Economic Inequality, Springer;Society for the Study of Economic Inequality, vol. 14(2), pages 141-172, June.
    4. Foster, James & Greer, Joel & Thorbecke, Erik, 1984. "A Class of Decomposable Poverty Measures," Econometrica, Econometric Society, vol. 52(3), pages 761-766, May.
    5. Martin Ravallion, 2013. "How Long Will It Take to Lift One Billion People Out of Poverty?," The World Bank Research Observer, World Bank, vol. 28(2), pages 139-158, August.
    6. Yoshida, Nobuo & Uematsu, Hiroki & Sobrado, Carlos E., 2014. "Is extreme poverty going to end ? an analytical framework to evaluate progress in ending extreme poverty," Policy Research Working Paper Series 6740, The World Bank.
    7. Camelia Minoiu & Sanjay Reddy, 2014. "Kernel density estimation on grouped data: the case of poverty assessment," The Journal of Economic Inequality, Springer;Society for the Study of Economic Inequality, vol. 12(2), pages 163-189, June.
    8. Ferreira, Francisco H. G. & Leite, Phillippe G., 2003. "Policy options for meeting the Millennium Development Goals in Brazil : can micro-simulations help?," Policy Research Working Paper Series 2975, The World Bank.
    9. Dani Rodrik, 2014. "The Past, Present, and Future of Economic Growth," Challenge, Taylor & Francis Journals, vol. 57(3), pages 5-39.
    10. Shaohua Chen & Martin Ravallion, 2010. "The Developing World is Poorer than We Thought, But No Less Successful in the Fight Against Poverty," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 125(4), pages 1577-1625.
    11. Martin Ravallion, 2003. "Measuring Aggregate Welfare in Developing Countries: How Well Do National Accounts and Surveys Agree?," The Review of Economics and Statistics, MIT Press, vol. 85(3), pages 645-652, August.
    12. Andy Sumner & Christopher Hoy & Eduardo Ortiz-Juarez, 2020. "Estimates of the impact of COVID-19 on global poverty," WIDER Working Paper Series wp-2020-43, World Institute for Development Economic Research (UNU-WIDER).
    13. Ravallion, Martin & Chen, Shaohua, 2003. "Measuring pro-poor growth," Economics Letters, Elsevier, vol. 78(1), pages 93-99, January.
    14. Francisco H. G. Ferreira & Phillippe G. Leite, 2003. "Meeting the Millennium Development Goals in Brazil: Can Microeconomic Simulations Help?," Economía Journal, The Latin American and Caribbean Economic Association - LACEA, vol. 0(Spring 20), pages 235-280, January.
    15. Hillebrand, Evan, 2008. "The Global Distribution of Income in 2050," World Development, Elsevier, vol. 36(5), pages 727-740, May.
    16. Christoph Lakner & Branko Milanovic, 2016. "Global Income Distribution: From the Fall of the Berlin Wall to the Great Recession," The World Bank Economic Review, World Bank, vol. 30(2), pages 203-232.
    17. Aziz Atamanov & Dean M. Jolliffe & Christoph Lakner & Espen Beer Prydz, 2018. "Purchasing Power Parities Used in Global Poverty Measurement," Global Poverty Monitoring Technical Note Series 5, The World Bank.
    18. Sudhir Anand & Paul Segal, 2008. "What Do We Know about Global Income Inequality?," Journal of Economic Literature, American Economic Association, vol. 46(1), pages 57-94, March.
    19. Dhongde, Shatakshee & Minoiu, Camelia, 2013. "Global Poverty Estimates: A Sensitivity Analysis," World Development, Elsevier, vol. 44(C), pages 1-13.
    20. Lakner,Christoph & Negre Rossignoli,Mario & Prydz,Espen Beer & Lakner,Christoph & Negre Rossignoli,Mario & Prydz,Espen Beer, 2014. "Twinning the goals : how can promoting shared prosperity help to reduce global poverty ?," Policy Research Working Paper Series 7106, The World Bank.
    21. Aziz Atamanov & Christoph Lakner & Daniel Gerszon Mahler & Samuel Kofi Tetteh Baah & Judy Yang, 2020. "The Effect of New PPP Estimates on Global Poverty: A First Look," Global Poverty Monitoring Technical Note Series 12, The World Bank.
    22. Tomas Hellebrandt & Paolo Mauro, 2015. "The Future of Worldwide Income Distribution," LIS Working papers 635, LIS Cross-National Data Center in Luxembourg.
    23. Angus Deaton, 2005. "ERRATUM: Measuring Poverty in a Growing World (or Measuring Growth in a Poor World)," The Review of Economics and Statistics, MIT Press, vol. 87(2), pages 395-395, May.
    24. Ravallion, Martin, 2001. "Growth, Inequality and Poverty: Looking Beyond Averages," World Development, Elsevier, vol. 29(11), pages 1803-1815, November.
    25. World Bank, 2014. "Prosperity for All / Ending Extreme Poverty : A Note for the World Bank Group Spring Meetings 2014," World Bank Publications - Books, The World Bank Group, number 17701, December.
    26. Dean Jolliffe & Espen Beer Prydz, 2016. "Estimating international poverty lines from comparable national thresholds," The Journal of Economic Inequality, Springer;Society for the Study of Economic Inequality, vol. 14(2), pages 185-198, June.
    27. World Bank, 2018. "Poverty and Shared Prosperity 2018 [Rapport 2018 sur la pauvreté et la prospérité partagée]," World Bank Publications - Books, The World Bank Group, number 30418, December.
    28. Maxim Pinkovskiy & Xavier Sala-i-Martin, 2016. "Lights, Camera … Income! Illuminating the National Accounts-Household Surveys Debate," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 131(2), pages 579-631.
    29. Kakwani, Nanak, 1993. "Poverty and Economic Growth with Application to Cote d'Ivoire," Review of Income and Wealth, International Association for Research in Income and Wealth, vol. 39(2), pages 121-139, June.
    30. Edward, Peter & Sumner, Andy, 2014. "Estimating the Scale and Geography of Global Poverty Now and in the Future: How Much Difference Do Method and Assumptions Make?," World Development, Elsevier, vol. 58(C), pages 67-82.
    31. Nanak Kakwani, 1993. "Poverty And Economic Growth With Application To Côte D'Ivoire," Review of Income and Wealth, International Association for Research in Income and Wealth, vol. 39(2), pages 121-139, June.
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