The World Wheat Trade Model: Specification, Estimation, and Validation
介绍了由农业与农村发展中心开发的小麦贸易模型，该模型通过供需交叉价格联系与其他商品模型联动，可独立或迭代求解，确定均衡价格、供需量和净贸易。
The wheat trade model is one of the three models in the trade modeling system developed, updated, and maintained by the Center for Agricultural and Rural Development (CARD). The other two commodity trade models are for feed grains and the soybeans complex. The three trade models are linked through cross-price linkages in the supply and demand components of these models, yet each model can be solved on a stand-alone basis. In general, however, all three trade models are solved iteratively to obtain a simultaneous solution. Equilibrium prices, quantities of supply and demand and net trade are determined by equating excess demands and supplies across regions and explicitly linking prices in each region to a world reference price.