4. World Bank's International Comparison Program. The World Bank has an ongoing research program that focuses on the relative purchasing power of 107 different economies globally, specifi- cally in terms of household consumption. Download the latest data tables and highlight which economies seem to be showing the greatest growth in recent years in relative purchasing power. World Bank International Comparison Program web.worldbank.org/WBSITE/EXTERNAL/ DATASTATISTICS/ICPEXT/ 0,,pagePK:62002243-theSitePK:270065,00.html