THE CHOICE OF OPTIMAL PROTECTION AND OLIGOPOLY： IMPORT TARIFFS VS PRODUCTION SUBSIDIES

This paper analyzes the choice of import tariffs and production subsidies to provide optimal protection of domestic industry in the presence of oligopolistic competition, provided that there is a difference in costs between domestic and foreign firms. We show that the choice of optimal protection depends both on the difference in firms ' costs and the relative number of firms across countries. First, in the case that the number of foreign firms is larger, an optimal protection is a production subsidy, regardless of the difference in costs. Second, in the case that the number of foreign firms is equal to, or less than that of domestic firms, an import tariff provides optimal protection if the difference in costs is large, while a production subsidy provides optimal protection if the differece in costs is small