Trade and direct investment in producer services and the domestic market for expertise
基于垄断竞争模型，研究了外国生产者服务对国内企业的影响，发现服务贸易可能逆转最终品比较优势，最优政策可能是补贴，且改革可能带来公平问题。
Abstract. Foreign producer services can provide substantial benefits for domestic firms. We build on earlier monopolistic‐competition models of intermediate producer services in this paper. Results show that: (1) while foreign services are partial‐equilibrium substitutes for domestic skilled labour, they may be general‐equilibrium complements, (2) service trade can provide crucial missing inputs that reverse comparative advantage in final goods, (3) the ‘optimal’ tax on imported services may be a subsidy, and (4) in our dynamic formulation, there may be earnings losses for immobile workers along a transition path that suggest potentially important equity consequences of reform.