Supply, Demand, and Technology in a Multiproduct Industry: Texas Field Crops
利用对偶方法研究德克萨斯州六种大田作物和三种可变投入之间的技术、供给和需求关系，发现小麦存在非联合生产，而棉花、高粱和玉米具有同质可分性，并估计了产品供给和投入需求方程。
Abstract Technology, supply, and demand relationships among six Texas field crops and three variable inputs are investigated using a dual approach. Evidence of nonjoint production is found for wheat but not for other crops. Cotton, sorghum, and corn are homothetically separable. No larger groups of outputs nor any input groups satisfy the sufficient dual conditions for consistent aggregation and two‐stage choice. Production is homothetic in outputs, fertilizer, and hired labor. Product supply and input demand equations are estimated. Estimates are inconsistent with expectations of the competitive model. The normalized profit function Hessian is not positive definite, and parameter symmetry is rejected.