美国经济学家保罗·克鲁格曼(Paul Krugman)因“在贸易模式上所做的分析工作和对经济活动的定位”方面的贡献而独获2008年度诺贝尔经济学奖。本文重点通过Krugman模型(Krugman,1979)分析Krugman对新贸易理论的贡献,指出新贸易理论与传统贸易理论和“新—新”贸易理论(异质性企业模型)的联系与区别。 American economist Paul Krugman won the 2008 Nobel Prize for Economics for his contribution to “Analysis of Trade Patterns and Positioning of Economic Activity.” This paper analyzes Krugman’s contribution to the new trade theory through the Krugman model (Krugman, 1979) and points out the connection and difference between the new trade theory and the traditional trade theory and the new-new trade theory (heterogeneous business model).