From 2000 to 2014, per capita gross domestic product in Sub-Saharan Africa increased by almost 35 percent in real terms, doubling in some countries. Such progress happened while agricultural productivity growth remained low in the aggregate, despite some bright spots, and poverty reduction was...

Supermarkets are traditionally viewed by development economists, policymakers, and practitioners as the rich world's place to shop. The three regions discussed here have the great majority of the poor on the planet. But supermarkets are no longer just niche players for rich consumers in the...