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How Should We Measure Poverty in a Changing World? Methodological Issues and Chinese Case Study
Author(s) -
Osberg Lars,
Xu Kuan
Publication year - 2008
Publication title -
review of development economics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 50
eISSN - 1467-9361
pISSN - 1363-6669
DOI - 10.1111/j.1467-9361.2008.00449.x
Subject(s) - poverty , index (typography) , economics , purchasing power , china , population , development economics , ranking (information retrieval) , order (exchange) , econometrics , demographic economics , economic growth , geography , sociology , macroeconomics , demography , archaeology , finance , machine learning , world wide web , computer science
This study asks whether, in a rapidly changing world, the estimated proportion of the world's population with income below US$1 (adjusted according to purchasing power parity) per day is still a good measure of trends in poverty. It argues that strong economic growth in nations such as China implies that the commonly accepted international poverty line definition of one half median national equivalent income is increasingly relevant and that poverty intensity (the normalized deficit or Foster–Greer–Thorbecke (FGT) index of order one) is a better summary index. This index has a convenient graphical representation—the “poverty box”. Using the proposed poverty line and the example of ranking the level of rural poverty in Chinese provinces, the study demonstrates how poverty intensity replicates the poverty rankings of the Sen family of poverty indices and captures most of the information content of higher‐order FGT indices.