We consider social efficiency of firm-entry in the presence of foreign competition. If the labour markets are competitive, entry is insufficient for the domestic country if the transportation cost is low and the marginal costs of the domestic firms are sufficiently higher than the marginal cost...

We show the welfare effects of international trade cost reduction under endogenous domestic market structure. If the domestic labour market is competitive, there is no integer constraint and the trade cost represents transportation cost, a reduction in the transportation cost does not affect...