This article suggests a conceptual framework for analyzing the consequences of the recent prices increase on the poorest people in the world. The complexity of mechanisms at work is demonstrated. At the global level, the analysis points out that Sub Saharan Africa exhibits the worst situation...

The application of marginalist instruments for understanding the behaviour of Southern individuals has always met numerous oppositions. According to them, the rationality claimed by the neo_classical theory is not convenient for studying these non_western societies and the underlying...