Measuring upward mobility in developing countries

We don’t know much about economic mobility in developing countries compared to
the wealthier, data-rich societies which have been the subjects of so much recent
research. What does the data tell us so far, and what is important to find out? Debraj
Ray and Garance Genicot tell Tim Phillips why measuring upward mobility in low-
and middle-income countries is both difficult and important, and what their research
is revealing about the impact of growth on that mobility.