Allocatable Fixed Inputs and Jointness in Agricultural Production: Implications for Economic Modeling
指出土地等可分配固定投入是农业联合生产的重要来源，其分析含义不同于其他联合生产原因，需采用多产品系统建模，并讨论了原始方法与对偶方法在投入需求方程推导上的差异。
Abstract Allocatable fixed inputs, such as land, are a potentially important source of jointness in agriculture. As with other causes of jointness, they necessitate multiple‐product systems for modeling product supply and input demand. In other important ways, however, their analytical implications are very different from other causes of jointness. Model specification differs. Demand functions for the quantities of each input used in the production of individual commodities can be derived if a primal approach is used, but such allocation equations cannot in general be identified from a dual specification. Available allocation data are not even useful in such dual estimations.