Intra-subsaharan African trade appears to be very low, an outcome that is often attributed to the size of the exporting and the importing economies. If that were the explanation, there would be no untapped trade potential. We argue instead that the main determinants of this "missing trade" are...

Many recent papers have pointed to ambiguous trade effects of developing regional trade agreements, calling for a reassessment of their economic merits. We focus on six such agreements currently in force in Sub-Saharan Africa, Asia and Latin America, estimating their impacts on trade flows and...

The New Economic Geography literature claims that firms are ready to pay more tax in "big markets" because of agglomeration rents. Tax authorities can thus set higher tax rates in denser economic area, hence an opposite mechanism to the "race to the bottom" process described by the classical tax...

One of the striking features of many developing Regional Integration Areas (RIAs) is the strong asymmetry between countries. In this paper, we consider a three-country two-sector model in a footloose capital framework. Two of these countries are involved in a regional integration process while...

In "new economic geography" models, spatial concentration typically arises either because of worker mobility or because of vertical linkages among firms. We examine a setup that combines those two approaches in conjunction with local congestion costs. We find that, as trade costs are lowered,...