This study investigates the causal links among agricultural imports, agriculture productivity, and economic growth in 40 sub-Saharan African countries over the period 1990-2015. Granger causality tests are applied to infer direction of causality, and the generalized two-stage least squares...

Agriculture : the missing link -- Demand outrunning supply -- Land and water scarcity -- A century of yield takeoffs -- Raising grain yields -- Facing biological reality -- The emerging politics of scarcity -- An unprecedented challenge