The Global Monitoring Report 2014/2015: Ending Poverty and Sharing Prosperity was written jointly by the World Bank Group (WBG) and the International Monetary Fund, with substantive inputs from the Organisation for Economic Co-operation and Development. This year's report details, for the first...

"The "developing world's middle class" is defined here as those who are not poor when judged by the median poverty line of developing countries, but are still poor by US standards. The "Western middle class" is defined as those who are not poor by US standards. Although barely 80 million people...