We analyze the geographic concentration of economic activities within the framework of a two country-four region model. Trade between both regions and countries entails transaction costs which are differentiated according to the interregional or international nature of the flows. Allowing for...

We study the coagglomeration of domestic plants and foreign multinationals and the impact of this on domestic plant growth using data for Irish manufacturing. To this end we make use of the index developed by Ellison and Glaeser (1997) and find coagglomeration to be important for a number of...