The Generalized Gravity Equation, Monopolistic Competition, and the Factor-Proportions Theory in International Trade
构建了一个包含两个差异化产品行业和两种要素的世界贸易一般均衡模型，将引力方程与赫克歇尔-俄林模型及产业内贸易模型统一，并实证估计了行业资本劳动强度。
A general equilibrium model of world trade with two differentiated-product industries and two factors is developed to illustrate how the gravity equation, including exporter and importer populations, as well as incomes, fits with the Heckscher-Ohlin model of interindustry trade and the Helpman-Krugman-Markusen models of intraindustry trade. The study extends the microeconomic foundations for a generalized gravity equation in Bergstrand (1985) to incorporate relative factor-endowment differences and nonhomothetic tastes. Empirical estimates of this generalized gravity equation for single-digit Standard Industrial Trade Classification industry groups yield plausible inferences of their capital-labor intensities. Copyright 1989 by MIT Press.