Sangraula, PremRavallion, MartinChen, Shaohua2012-03-302012-03-302009-06-30World Bank Economic Review1564-698Xhttps://hdl.handle.net/10986/4499The article presents the first major update of the international $1 a day poverty line, proposed in World Development Report 1990: Poverty for measuring absolute poverty by the standards of the world's poorest countries. In a new and more representative data set of national poverty lines, a marked economic gradient emerges only when consumption per person is above about $2.00 a day at 2005 purchasing power parity. Below this, the average poverty line is $1.25, which is proposed as the new international poverty line. The article tests the robustness of this line to alternative estimation methods and explains how it differs from the old $1 a day line.CC BY-NC-ND 3.0 IGOabsolute povertyaid donorsestimates of povertyextreme povertyglobal povertyhousehold consumptionincomeinternational poverty linenational povertynational poverty linespoorpoor countriespoor peoplepoverty assessmentpoverty assessmentspoverty linepoverty measurespoverty reductionpoverty reduction strategypoverty reduction strategy papersDollar a Day RevisitedJournal ArticleWorld Bank10.1596/4499