Fig. 4.

Predicted spatial variation in the seasonal grain prices in Sub-Saharan Africa (SSA). Prices are expressed as the temporal price index is the local median monthly price divided by the annual price. The predictions where made with a Random Forest model using longitude, latitude, month of the year, and annual rainfall as predictor variables. Predictions were made for countries in SSA for which we had price data from local markets, excluding areas with annual precipitation lower than 200 mm.