International trade in a differentiated good: Trade elasticities in the world rice market
采用Armington方法将世界大米市场建模为差异化商品市场，并推导贸易弹性参数，纠正了以往将大米视为同质产品的偏差，对政策评估有参考价值。
Abstract In many previous rice trade models, the commodity has been regarded as a homogeneous product. However, homogeneity is not an appropriate assumption, given the various types of rice that are traded and consumed. Parameters estimated from these models, therefore, do not reflect the real world market for rice and, hence, may mislead decision makers who use the results for policy evaluation purposes. This study uses an Armington approach to model the world rice trade as a differential good market and to derive trade elasticity parameters.