INPUT PRICE DISCRIMINATION WHEN BUYERS OPERATE IN MULTIPLE MARKETS*
研究了当投入品买家服务于多个产品市场时，三级价格歧视的影响，发现价格歧视可能通过将产出转向竞争较弱的市场来提升福利。
This paper revisits third‐degree price discrimination when input buyers serve multiple product markets. Such circumstances are prevalent since buyers often use the same input to produce different outputs, and even homogenous outputs are routinely sold through different locations. The typical view is that price discrimination stifles efficiency (and welfare) by resulting in price concessions to less efficient firms. When buyers serve multiple markets, price discrimination leads to price breaks for firms in markets with lower demand. When lower demand markets also have less competition, price discrimination can provide welfare gains by shifting output to less competitive markets.