Tighter Price Cap Regulation on Consumer Surplus and Utility
Kang, Weisman, and Zhang (2000) demonstrated that, under a tighter price cap, consumer welfare increases with the independence of demands. Conversely, the tighter price cap may negatively impact consumer welfare in situations involving interdependent demands. This paper identifies an overlooked property of Kang et al. (2000), namely, that the cross-price effects should be symmetrical without an income effect and demand functions of a Hicksian type. This paper reveals the invariant conclusion that consumers always benefit from a tighter price cap. Besides, it further derives the effects of the tighter price cap on consumer utility, and concludes that the net price elasticity of demand is the key to the effect of the average revenue constraint.
Do consumers benefit from tighter price cap regulation
Abstract This paper examines whether consumers necessarily benefit from tightening the price cap. We find that a tighter price cap always increases consumer welfare when demands are independent. Conversely, when demands are interdependent a tighter price cap may reduce consumer welfare.
Welfare Effects of Price Discrimination by a Regulated Monopolist
Should a multiproduct monopolist whose "average price" is capped by regulation be allowed to engage in (third-degree) price discrimination? If the cap applies to a price index with weights proportional to demands at uniform prices, then price discrimination benefits consumers as well as the firm. But if -- perhaps more realistically -- it is the firm's average revenue that is capped, then consumers prefer uniform pricing. In this case total output is higher when discrimination is allowed, which increases welfare, but marginal utilities differ across markets, which is inefficient, and the overall effect is ambiguous. A small amount of discrimination is desirable, however. It is better not to allow price discrimination if the price cap is close to the level of marginal cost. The consequences of tightening the price cap when discrimination is allowed are also examined.