同質Bertrand 競爭下的最適貿易政策

Optimal Trade Policy Under Homogenous Bertrand Competition

10.29628/AEP.200303.0002

楊雅博(Ya-Po Yang)；黃鴻(Hong Hwang)

貿易政策 ； 出口政策 ； Bertrand 競爭 ； Trade policy ； Export policy ； Bertrand competition

經濟論文

31卷1期（2003 / 03 / 01）

73 - 89

繁體中文

根據Brander and Spencer (1985)與Eaton and Grossman (1986)之結果可知：當廠商採Cournot (Bertrand)競爭時，出口國政府應對其出口品補貼（課稅）。上述結果在出口商之產品為同質且採Bertrand競爭時，並不成立。本文發現：當產品為同質且出口商採Bertrand競爭時，出口國政府並沒有誘因對出口課稅；因此，最適貿易政策為自由貿易。

According to the trade model a la Brander and Spencer (1985) and Eaton and Grossman (1986), a country should subsidize (tax) its export if its firms compete with foreign firms in a third market under Cournot (Bertrand) fashion. This paper shows that this result does not hold under homogenous Bertrand competition. It is found that the optimal export policy becomes free trade if the domestic and foreign firms play in a Bertrand fashion and if their products are homogeneous.

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