Normal Inputs and Joint Production with Allocatable Fixed Factors
当联合生产由可分配固定要素引起时，在正常情况下，任一产出的边际成本随其他产出增加而上升，任一产出的供给随其他产出价格上升而下降，且投入品价格上涨可能导致某些产出供给增加。
Abstract When jointness is caused by allocatable fixed factors, in the normal case the marginal cost of any output increases as any other output increases, the supply of any output decreases as any other output price increases, and an input price increase may cause the supply of some outputs to increase.