差别产品双头竞争与最优进口税的决定

Differentiated Duopoly and the Determination of the Optimal Import Tax

本文讨论了在生产差别产品的一个本国企业和一个外国企业在本国市场进行竞争时 ,最优进口税的决定问题。同时检查了只有本国政府使用进口税干预时的所有可能 :对外国企业征收从量税、从价税 ;对本国消费者征收从量税、从价税。本文发现 ,在每一种情况下 ,只要进口税可以提高本国企业的产量 ,就可以找到一个具体条件 ,如果它得到满足 ,那么 ,进口税就是本国政府的Robust政策选择。

This paper discusses the determination of the optimal import tax in the scenario where a domestic firm and a foreign firm that produce differentiated products compete in the domestic market and examines all possibilities including specific tariff, ad valorem tariff and consumption tax. The main finding is that we can identify a particular condition for each possibility so that the optimal import tax would be robust to the mode of competition provided that the domestic production would increase with the tax.