[Paper in French] The issue of world food security is still at the core of international concerns with the rising prices of agricultural products over the period 2006-2008. In this context, most of the least developed countries are net importers of agricultural products since the beginning of...

Thanks to its empirical success, the gravity approach is widely used to explain trade patterns between countries. In this article we question the simple application of this approach to product/sector-level trade on two grounds. First, we demonstrate that the traditional Armington version of...