The Purchasing Power Parity (PPP) rates released in April 2014, based on the 2011 round of the International Comparison Program (ICP), entail some seemingly dramatic revisions to price levels and real incomes across the world. Looking back over the last three ICP rounds, back to 1993, it feels like we have been on an “ICP roller coaster” with falls in the estimated real incomes of many developing countries up to 2005 and then rises in 2011. The 2011 revisions have been taken to suggest substantially less poverty and inequality in the world than the 2005 round had implied. If we believe these new PPPs then the economic map of the world is quite different to what we thought. But can they be believed? A public debate has been generated by the new PPPs.
On July 9, 2014 Martin Ravallion (Department of Economics, Georgetown University) will shed more light on this ongoing debate at the Poverty and Applied Macro seminar hosted by the World Bank's research department.