James Foster is an American economist, distinguished professor, and academic, widely recognized for his significant contributions to the measurement and analysis of poverty and inequality. His work has profoundly influenced both academic research and international development policy, particularly through the development of widely adopted methodologies for quantifying various dimensions of deprivation.
Key Contributions and Research: Foster is best known for:
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Foster–Greer–Thorbecke (FGT) Poverty Measures: Developed in collaboration with Joel Greer and Erik Thorbecke, the FGT measures (often denoted P0, P1, P2, etc.) constitute a family of decomposable poverty indices. These measures are widely used by governments and international organizations to assess the incidence (P0, the headcount ratio), intensity (P1, the poverty gap), and severity (P2, squared poverty gap) of poverty. The FGT measures are axiomatic, satisfying properties like monotonicity, transfer, and subgroup decomposability, making them highly influential in poverty analysis.
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Alkire–Foster (AF) Method: In partnership with Sabina Alkire, Foster developed a dual-cutoff method for measuring multidimensional poverty. This method identifies individuals as multidimensionally poor if they are deprived in a sufficient number of weighted indicators across various dimensions (e.g., health, education, living standards). The AF method generates a class of poverty measures that are sensitive to both the incidence and intensity of poverty, including the Adjusted Headcount Ratio (M0). The Alkire–Foster method is notably employed by the United Nations Development Programme (UNDP) to calculate the Multidimensional Poverty Index (MPI), which is a key global poverty indicator.
His research also encompasses welfare economics, income distribution, and economic development, with a focus on operationalizing theoretical concepts for empirical application.
Academic Career and Affiliations: James Foster is a Professor of Economics and International Affairs at the George Washington University (GWU), where he also serves as the Director of the Institute for International Economic Policy (IIEP). Prior to joining GWU, he held positions at Vanderbilt University. He earned his Ph.D. in economics from Cornell University. Foster is also a Research Associate at the Oxford Poverty and Human Development Initiative (OPHI) at the University of Oxford, where he continues his collaborative work with Sabina Alkire and other researchers on multidimensional poverty.
Impact and Recognition: Foster's methodological contributions have become standard tools in the toolkit of economists and policymakers worldwide for measuring, analyzing, and monitoring poverty. His work provides a robust framework for comparing poverty levels across countries, over time, and among different population subgroups, thereby informing evidence-based policy interventions aimed at poverty reduction and human development.