International trade, gross substitutability and the domestic farm-retail price margin
在两国家、一商品、两要素框架下，研究了国际贸易和政府干预对农场-零售价格差额的影响，发现该差额对政府干预和投入品间的总替代性敏感。
The effect of international trade and governmental intervention on the farm-retail price margin (ratio) is examined in a two country, one commodity, two factor framework. Both theoretical and numerical approaches are used in the paper's analysis. It is found that the farm-retail price margin is sensitive to governmental intervention in the international pricing mechanism as well as to the degree of gross substitutability between inputs.