Effects of Cost Changes on Oligopolists' Profits
研究了在规模报酬不变的古诺寡头垄断中，成本增加可能反而使部分或全部企业受益，受益与否取决于市场份额是否超过阈值、行业成本变化方向、企业数量和需求曲线斜率弹性。
This paper considers cost changes affecting all firms in a constant-returns-to-scale Cournot oligopoly. Cost increases may paradoxically benefit some or even all firms. Whether a firm benefits or is harmed depends only on whether its market share exceeds a threshold level, on whether industry costs increase or decrease, on the number of firms, and on the elasticity of the demand curve's slope (or equivalently, the fraction of cost changes that are passed on). Conditions where industry structure alone determines the effect of cost changes on firms' profits and conditions where cost increases necessarily harm some firms are developed. Copyright 1992 by Blackwell Publishing Ltd.