Why has Africa been slow in developing its agriculture? 

Ousmane Badiane, Director for Africa at IFPRI, talks about the investment and policy strategies needed for a dynamic agricultural sector, and how conditions in Africa differ from those in Asia. Peter Timmer, Thomas D. Cabot Professor of Development Studies, Emeritus, at Harvard University, provides commentary. This is the second lecture in Stanford's Center on Food Security and the Environment's Global Food Policy and Food Security Symposium series.