The flexible CES-GBC family of cost functions: Derivation and application

Asher Tishler, Stan Lipovetsky

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


Recent research has indicated that flexible forms do not always generate empirically credible elasticity estimates. In this paper we present a methodology from which we derive a new family of flexible functional forms (denoted by CES-GBC) that are richer in structure than the cost functions in current use. We use the CES-GBC form to estimate the demand for electricity under time-of-use pricing. The estimation results are encouraging. The elasticity estimates are very reasonable and the fit of the estimated equations is far superior than the more commonly used generalized Leontief, generalized square root quadratic, or any other member of the generalized Box-Cox family of cost functions.

Original languageEnglish
Pages (from-to)638-646
Number of pages9
JournalReview of Economics and Statistics
Issue number4
StatePublished - Nov 1997


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