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Abstract

Caves et al. (1983) recently reported that mandatory time-of-use (TOU) pricing for residential customers served by four Illinois electric utilities fails to pass the cost-benefit test. Gains in economic efficiency are outweighed by the relatively high TOU meter costs. An obvious alternative is to offer a TOU rate option for which customer participation is voluntary (see, for example, Woo et al. [1983, Section D] and Malko and Faruqui [1980, pp. 161-62]). The problem of optimal pricing under self-selection has been analyzed by Faulhaber and Panzar (1977), Panzar and Sibley (1978), and Mirman and Sibley (1980). Following these studies, this paper derives the optimal electricity prices when a customer can choose between paying the TOU rates and the full incremental costs of a TOU meter and remaining on a flat rate schedule. My approach departs from the earlier studies in using the expenditure function to characterize the optimization problem as described by Diamond and McFadden (1974).

Keywords

Electric utilities TOU pricing Illinois Residential electricity demand

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An Application of the Expenditure Function in Electricity Pricing: Optimal Residential Time-of-Use Rate Option

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