The majority of the world's poor, by income poverty and multi-dimensional poverty, now live in countries officially classified by the World Bank as middle-income countries. Of course nothing happens when a country crosses a (somewhat) arbitrary threshold in per capita income but it does matter...

What has happened to inequality between and within countries since 1990? In this paper we explore who have been the winners and losers from global growth since 1990. We find that falls in total global inequality in the last 30 years are predominantly attributable to rising prosperity in China....

In the past three decades, developing countries have made significant economic and social progress, from improved infant mortality rates to higher life expectancy. Yet, 1.3 billion people continue to live in extreme poverty in the developing world, leading policymakers to place a renewed...