Trade costs, wage difference, and endogenous growth

In this paper, we develop an endogenous growth and international trade model with two countries in which equilibrium wages in the two countries are different between two countries. First, when trade costs are high, the share of manufacturing firms in the large country increases with a decline in trade costs because of market size. However, the share of firms then decreases with a decline in trade costs when trade costs are low because of wage differences. Finally, all firms agglomerate in the small country, since production costs in the small country are low. In this process, the innovation sector shifts its location from the large-market and high-wage country to the small-market and low-wage country.