Intra‐industry trade: A Krugman–Ricardo Model and Data
构建了一个结合李嘉图比较优势和规模报酬递增的多国多部门贸易模型，预测产业内贸易指数与出口部门数正相关、与进口部门数负相关，并用联合国贸易数据验证了该模型，发现其对非OECD国家拟合更好。
This paper develops a model of international trade with a continuum of countries and sectors, which combines Ricardian comparative advantage and increasing returns to scale. Trade consists of both inter‐ and intra‐industry trade. The model predicts that the trade‐weighted Grubel–Lloyd index of intra‐industry trade is positively related to the number of exported sectors, and is negatively related to the number of imported sectors. Empirical evidence from a panel of countries using the UN Comtrade database supports these predictions, and the model fits the data better for non‐ OECD than for OECD countries.