研討日期

2009年6月27日上午10:20 ~ 13:00

研討地點

台灣大學社會科學院   電化教室

討論文獻

題目

作者

文獻出處

Distorted Gravity:
The Intensive and Extensive Margins of International Trade

Thomas Chaney

 

American Economic Review, 2008

報告人

康廷嶽

參加人員

黃鴻    梁文榮    吳芝文    康廷嶽    王光正    蔡明芳    曾靜枝    高國峯    張民忠    彭正浩    林大鈞    鐘嘒陵    涂光億    陳宏易    李朝功    丁虹仁    陳玉晏    周品旭    林晏如    吳宜謙

論文提要

Introducing firm heterogeneity leaves many of the predictions of the Krugman (1980) model of international trade unaffected. Most important, the gravity structure of bilateral trade flows is preserved. In this paper, I have identified a key difference between the Krugman model with representative firms and a model with firm heterogeneity. The impact of trade barriers is dampened by the elasticity of substitution, and not magnified by it. I introduce fixed export costs and adjustments on the extensive margin in a simple model of international trade. A high elasticity of substitution translates productivity differences into large differences in size. As firm sizes get more dispersed, fixed costs have a lesser impact on exports: large firms can easily overcome those fixed costs. Aggregate trade flows are less sensitive to trade barriers when goods are more substitutable.

研究建議