The Purchasing Power Parity (PPP) rates from the 2011 round of the International Comparison Program (ICP) imply some dramatic revisions to price levels and real incomes across the world. The paper tries to understand these changes. Domestic inflation rates account for a share of the PPP changes,...

In what is probably the largest cash transfer program in the world today China’s Dibao program aims to fill all poverty gaps. In theory, the program creates a poverty trap, with 100% benefit withdrawal rate (BWR). But is that what we see in practice? The paper proposes an econometric method of...

The traditional approach to poverty measurement puts no explicit weight on success at increasing the typical level of living of the poorest—raising the consumption floor. To address this deficiency, the paper defines and measures the expected value of the floor, allowing for transient effects...

In this paper, we propose a new measure of horizontal equity that overcomes many of the shortcomings of previous proposed measures. Our starting point is the observation that a well-behaved social welfare function need not evaluate global' (vertical equity) differences in after-tax income using...