ABSTRACT: This paper introduces a trade cost asymmetry into the Core-periphery model to
investigate the location effects of protection. Trade costs arise from the active choice of
governments. In the case of a country that can decide the level of barriers to imports without
retaliation by the other country, unilateral protection is shown to attract firms and to increase the
welfare of residents. Since all countries face a rational incentive to unilateral protection, noncooperative
behaviour may lead to an inefficient equilibrium with too much protection.