Agriculture makes up a large share of employment and GDP in Africa, but crop yields remain stubbornly low. VoxDev has published Issue 2 of Agricultural Technology in Africa, which reviews what the published literature can – and cannot – explain about this stagnation. Chris Udry, one of the...

How can we take what we learn in educational RCTs and apply it at scale to many schools, maybe in many countries? Adrienne Lucas talks to Tim Phillips about the project she was part of to improve learning in Ghana, the difference between small- and large-scale trials, and the challenge of...