垂直相關市場中之策略性環境與貿易政策

Strategic Environmental and Trade Policies in the Presence of a Vertical Related Market

林燕淑(Yan-Shu Lin)

《農業與資源經濟》 7卷1期 (2010/06) Pp. 73-94

https://doi.org/10.29796/ARE.201006.0004

摘要

本文設立一個兩國模型，本國擁有一家垂直整合廠商，外國擁有一家專業化生產最終財廠商，本國廠商將產品出口到外國最終財市場進行數量競爭，廠商生產最終財的過程中會排放污染，政府對此污染採取環境稅政策，同時本國政府對出口的中間財與最終財採行出口貿易政策。本文發現：(1)即使本國廠商在最終財市場獲利性較高，最終財最適貿易政策不一定爲出口補貼。(2)自由貿易情況之下，本國最適環境稅是否爲皮古稅，須視廠商出口中間財和最終財的單位利潤差異而定。(3)中間財市場的貿易自由化會使本國環境稅下降，亦可能使出口國福利下降。

關鍵字

垂直相關市場 ； 環境政策 ； 貿易政策

並列摘要

This paper sets a model with two countries: a domestic vertically integrated firm controls the exports of both input and output products and a foreign firm produces the final good specialized. The domestic firm exports its final product, which environmental pollution will emerge during the production process, and engage in Cournot competition in a foreign market. Domestic government uses the export policies to the intermediate and the final goods, and pollution tax on final products. We find that: (1) even if domestic vertically integrated firm has higher profit in the final goods market, the optimal trade policy for the final goods may not be export subsidies; (2) the optimal pollution tax might not be the Pigouvian tax in the case of free trade, which depends on the difference in profit margins from the export of the intermediate and final products, (3) trade liberalization in intermediate market will decrease the domestic pollution tax and maybe also decrease the exporting country's welfare.

並列關鍵字

Vertical Related Market ； Environmental Tax ； Trade Policies