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Designing Electricity Auctions

Fabra, Natalia; Fehr, Nils-Henrik Von der; Harbord, David
Fonte: Universidade Carlos III de Madrid Publicador: Universidade Carlos III de Madrid
Tipo: Trabalho em Andamento Formato: application/pdf
Publicado em /02/2004 ENG
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Motivated by the new auction format introduced in the England andWales electric- ity market, as well as the recent debate in California, we characterize bidding behavior and market outcomes in uniform and discriminatory electricity auctions. We ¯nd that uniform auctions result in higher average prices than discriminatory auctions, but the ranking in terms of productive e±ciency is ambiguous. The comparative e®ects of other market design features, such as the number of steps in suppliers' bid functions, the duration of bids and the elasticity of demand are also analysed. We also consider the relationship between market structure and market performance in the two auction formats. Finally, we clarify some methodological issues in the analysis of electricity auctions. In particular, we show that analogies with continuous share auctions are misplaced so long as ¯rms are restricted to a ¯nite number of bids.