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Constructing Comparable Global Poverty Trends

Author

Listed:
  • Daniel Gerszon Mahler
  • Elizabeth Foster
  • Christoph Lakner
  • Zander Prinsloo
  • Rostand Tchouakam Mbouendeu
  • Samuel K. Tetteh-Baah

Abstract

Countries frequently revise how they measure income or consumption due to changes in data collection and questionnaire design. These changes create comparability breaks in poverty trends over time. This paper develops three methods to create global, regional, and country-level poverty trends that are comparable within countries over time. It does so by using national accounts growth to bridge non-comparable sequences. Accounting for comparability breaks creates large differences in some country-level poverty trends, but the global extreme poverty trend built from these comparable poverty series remains largely unchanged.

Suggested Citation

  • Daniel Gerszon Mahler & Elizabeth Foster & Christoph Lakner & Zander Prinsloo & Rostand Tchouakam Mbouendeu & Samuel K. Tetteh-Baah, 2025. "Constructing Comparable Global Poverty Trends," Global Poverty Monitoring Technical Note Series 45, The World Bank.
    • Handle: RePEc:wbk:wbgpmt:45
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