How can economists and policymakers accurately measure and compare poverty levels across diverse global populations and time periods? Martin Ravallion, a leading expert in development economics and former director of the World Bank's research department, investigates the methodological challenges inherent in defining poverty thresholds. He provides a rigorous framework for evaluating how different social, economic, and geographic contexts influence the interpretation of poverty data, arguing that static metrics often fail to capture the complexity of human deprivation.

Experts recognize this work as a foundational text for understanding the complexities of global poverty measurement. Readers frequently note the academic density of the prose, which is intended for students and professionals in economics and public policy.