Trying to Understand the PPPs in ICP2011: Why are the Results so Different?
---- Acknowledgments ----
We are grateful to Orley Ashenfelter, Grant Cameron, Erwin Diewert, Bill Easterly, Rob Feenstra, Nada Hamadeh, Alan Heston, Robert Inklaar, Michel Mouyelo-Katoula, Paul McCarthy, Prasada Rao, Marko Rissanen, Marcel Timmer, and Fred Vogel for help, comments and suggestions. The views expressed in this paper are solely those of the authors and not necessarily those of the U.S. Bureau of Economic Analysis, the U.S. Department of Commerce, or the National Bureau of Economic Research. Both Aten and Deaton are consultants to the International Comparison Program (ICP); Aten as a member of the Computation Task Force, and Deaton as a member of the Technical Advisory Group. The research reported in this paper was not funded by the ICP. The data used in the paper are either from the World Development Indicators or can be accessed via application to the ICP; for details see http://siteresources.worldbank.org/ICPINT/Resources/270056-1255977254560/121120_ICPDataAccessPrinciples&Procedures.pdf