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...

This paper takes a fresh look, from a macro perspective, at the issue of aid effectiveness. An important point of departure for this study is that it adopts poverty reduction, as contrasted from economic growth, as the metric for measuring aid effectiveness. In conducting the empirical...