品質改善型R&D投資と関税政策

概要

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In this paper we analyze the effects of tariffs on R & D expenditure of foreign firms which perform quality-improving R & D activities. It is shown that the 'Most Favored Nations' (MFN) clause is superior to the discriminatory tariff regime as the importing country's trade policy. Furthermore, government R & D policies depend on the levels of spillover and product differentiation, so that government must coordinate the tariff policy according to these levels. We conclude that the levels of the cooperative equilibrium are higher than those of the non-cooperative one when the spillover effect is larger in the MFN clause case than in the case of discriminatory tariff regimes. The possibility that R & D cooperation, therefore, hurts the importing country's welfare becomes high, and then this tendency becomes strong as goods approach to perfect substitution goods. When the government takes the MFN clause, it is desirable to take positively the policy which leads to restriction of R & D cooperation, compared with the case of discriminatory tariff regimes.
日本国際経済学会の論文