Supply Analysis in an Oligopsony Model
分析农产品供给变动如何影响寡头买方垄断市场中的均衡价格、数量及加工商利润，发现其定性影响与完全竞争和垄断买方不同，对供给估计和农业政策分析有启示。
Abstract Primary agricultural markets are often characterized by oligopsony. This paper investigates the effect of an agricultural product supply shift on the equilibrium prices and quantities of farm products purchased by food processors. and on profits of food processors. The principal comparative static result indicates that, under oligopsony, qualitative implications of a disturbance in the supply of raw input differ from that under perfect competition and monopsony. Effects of other disturbances are identical in sign to the perfectly competitive case, although magnitudes may differ. Implications for supply estimation and agricultural policy analysis are briefly discussed.