This paper studies Krugman's (1991) core-periphery model and extends it to include environmental pollution. We present the first analytic proof that only an even spreading of the firms over both of the two regions or a complete agglomeration of all manufacturing firms in one region are possible...

We incorporate the now standard knowledge-capital model of multinational firms in a new economic geography setting. The theoretical predictions of our model suggest that unskilled labor mobility leads to less concentration of production than skilled labor mobility does. This is in line with...