This teaching material concentrates on the influence of transportation costs, size of markets and productivity differences in the competitiveness of producers located in different places. It is a simple presentation of the approach taken by Krugman, by Button and by Richardson in their...

The fastest massive increase in poverty in Latin American modern history is commonly attributed to the debt crisis. The 80s of this ending century have been called “the lost decade”. The Jubilee 2000 campaign presses for placing a strong moral exigency on the creditors and must lay a solid...

Wealth and poverty, progress and regress are the type of realities usually related on moral grounds. Scientifically serious causal economic relations are not so easy to find. Moral criteria does not require scientific proof of causality. But this search for causal links is also important to...