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Pricing and capacity provision in electricity markets: an experimental study

Chloé Coq (), Henrik Orzen () and Sebastian Schwenen ()
Additional contact information
Chloé Coq: SITE
Henrik Orzen: University of Mannheim
Sebastian Schwenen: Technical University of Munich

Journal of Regulatory Economics, 2017, vol. 51, issue 2, 123-158

Abstract: Abstract The creation of adequate investment incentives has been of great concern in the restructuring of the electricity sector. However, to achieve this, regulators have applied different market designs across countries and regions. In this paper we employ laboratory methods to explore the relationship between market design, capacity provision and pricing in electricity markets. Subjects act as firms, choosing their generation capacity and competing in uniform price auction markets. We compare three regulatory designs: (1) a baseline price cap system that restricts scarcity rents, (2) a price spike regime that effectively lifts these restrictions, and (3) a capacity market that directly rewards the provision of capacity. Restricting price spikes leads to underinvestment. In line with the regulatory intention both alternative designs lead to sufficient investment albeit at the cost of higher energy prices during peak periods and substantial capacity payments in the capacity market regime. To some extent these results confirm theoretical expectations. However, we also find lower than predicted spot market prices as sellers compete relatively intensely in capacities and prices, and the capacity markets are less competitive than predicted.

Keywords: Price caps; Electricity; Supply function competition; Auctions (search for similar items in EconPapers)
JEL-codes: C91 L13 L94 (search for similar items in EconPapers)
Date: 2017
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