# Pricing and capacity provision in electricity markets: an experimental study

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## 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## JEL Classification

C91 L13 L94## References

- Abbink, K., Brandts, J., & McDaniel, T. (2003). Asymmetric demand information in uniform and discriminatory call auctions: An experimental analysis motivated by electricity markets.
*Journal of Regulatory Economics*,*23*(2), 125–144.CrossRefGoogle Scholar - Allaz, B., & Vila, J.-L. (1993). Cournot competition, forwards markets and efficiency.
*Journal of Economic Theory*,*59*(1), 1–16.CrossRefGoogle Scholar - Boom, A. & Schwenen, S. (2013). Real-time pricing in power markets: Who gains?
*Scandinavian Working Papers in Economics*, No 01-2013.Google Scholar - Borenstein, S., Bushnell, J., & Wolak, F. (2002). Measuring market inefficiencies in California’s restructured wholesale electricity market.
*American Economic Review*,*92*(5), 1376–1405.CrossRefGoogle Scholar - Borenstein, S. (2005). The long-run efficiency of real-time electricity pricing.
*The Energy Journal*, 93–116.Google Scholar - Brandts, J., Reynolds, S. S., & Schram, A. (2014). Pivotal suppliers and market power in experimental supply function competition.
*Economic Journal*,*124*(579), 887–916.Google Scholar - Camerer, C. (2003).
*Behavioral game theory: Experiments in strategic interaction*. Princeton: Princeton University Press.Google Scholar - Cramton, P., & Stoft, S. (2005). A capacity market that makes sense.
*The Electricity Journal*,*18*(7), 43–54.CrossRefGoogle Scholar - Cramton, P., Ockenfels, A., & Stoft, S. (2013). Capacity market fundamentals.
*Economics of Energy and Environmental Policy*,*2*(2), 27–46.CrossRefGoogle Scholar - Crampes, C., & Léautier, T.-O. (2015). Demand response in adjustment markets for electricity.
*Journal of Regulatory Economics*,*48*(2), 169–193.CrossRefGoogle Scholar - Creti, A., & Fabra, N. (2007). Supply security and short-run capacity markets for electricity.
*Energy Economics*,*29*(2), 259–276.CrossRefGoogle Scholar - Crew, M. A., & Kleindorfer, P. R. (1979).
*Public utility economics*. London: Macmillan Press.CrossRefGoogle Scholar - Diekmann, A. (1985). Volunteer’s dilemma.
*Journal of Conflict Resolution*,*29*(4), 605–610.Google Scholar - Diekmann, A. (1993). Cooperation in an asymmetric volunteer’s dilemma game: Theory and experimental evidence.
*International Journal of Game Theory*,*22*(1), 5–85.CrossRefGoogle Scholar - Engelmann, D., & Grimm, V. (2009). Bidding behaviour in multi-unit auctions: An experimental investigation.
*Economic Journal*,*119*(537), 855–882.Google Scholar - Fabra, N., von der Fehr, N. H. M., & De Frutos, M. Á. (2011). Market design and investment incentives.
*Economic Journal*,*121*(557), 1340–1360.Google Scholar - Fabra, N., von der Fehr, N.-H. M., & Harbord, D. (2006). Designing electricity auctions.
*RAND Journal of Economics*,*37*(1), 23–46.CrossRefGoogle Scholar - Feldhaus, C., & Stauf, J. (2016). More than words: The effects of cheap talk in a volunteer’s dilemma.
*Experimental Economics*,*19*(2), 342–359.CrossRefGoogle Scholar - FERC. (2013).
*Centralized capacity market design elements*. Staff Report: Federal Energy Regulatory Commission.Google Scholar - Goeree, J. K., Holt, C. A., & Smith, A. M. (2017). An experimental examination of the volunteer’s dilemma.
*Games and Economic Behavior*,*102*, 303–315.CrossRefGoogle Scholar - Hancher, L., de Houteclocque, A., & Sadowska, M. (Eds.). (2015).
*Capacity mechanisms in EU energy markets: Law, policy, and economics*. Oxford: Oxford University Press.Google Scholar - Henze, B., Noussair, C., & Willems, B. (2012). Regulation of network infrastructure investments: An experimental evaluation.
*Journal of Regulatory Economics*,*42*(1), 1–38.CrossRefGoogle Scholar - Hortaçsu, A., & Puller, S. L. (2008). Understanding strategic bidding in multi-unit auctions: A case study of the Texas electricity spot market.
*RAND Journal of Economics*,*39*(1), 86–114.CrossRefGoogle Scholar - Joskow, P., & Tirole, J. (2007). Reliability and competitive electricity markets.
*RAND Journal of Economics*,*38*(1), 60–84.CrossRefGoogle Scholar - Kahneman, D. (1988). Experimental economics: A psychological perspective. In R. Tietz, W. Albers, & R. Selten (Eds.),
*Bounded rational behavior in experimental games and markets*. Berlin: Springer.Google Scholar - Kahneman, D., & Tversky, A. (1979). Prospect theory: An analysis of decision under risk.
*Econometrica*,*47*(2), 263–291.CrossRefGoogle Scholar - Kaiser, J. (2007). An exact and a Monte Carlo proposal to the Fisher-Pitman permutation tests for paired replicates and for independent samples.
*Stata Journal*,*7*(3), 402–412.Google Scholar - Kiesling, L., & Wilson, B. (2007). An experimental analysis of the effects of automated mitigation procedures on investment and prices in wholesale electricity markets.
*Journal of Regulatory Economics*,*31*(3), 313–334.CrossRefGoogle Scholar - Léautier, T.-O. (2016). The visible hand: Ensuring optimal investment in electric power generation.
*The Energy Journal*,*37*(2), 89–109.Google Scholar - Le Coq, C., & Orzen, H. (2006). Do forward markets enhance competition? Experimental evidence.
*Journal of Economic Behavior and Organization*,*61*(3), 415–431.CrossRefGoogle Scholar - Schwenen, S. (2015). Strategic bidding in multi-unit auctions with capacity constrained bidders: The New York capacity market.
*RAND Journal of Economics*,*46*(4), 730–750.CrossRefGoogle Scholar - Selten, R., Chmura, T., & Goerg, S. J. (2011). Stationary concepts for experimental 2x2 games: Reply.
*American Economic Review*,*101*(2), 44–1041.CrossRefGoogle Scholar - van Koten, S., & Ortmann, A. (2013). Structural versus behavioral remedies in the deregulation of electricity markets: An experimental investigation motivated by policy concerns.
*European Economic Review*,*64*, 256–265.CrossRefGoogle Scholar - Vossler, C. A., Mount, T. D., Thomas, R., & Zimmerman, R. (2009). An experimental investigation of soft price caps in uniform price auction markets for wholesale electricity.
*Journal of Regulatory Economics*,*36*(1), 44–59.CrossRefGoogle Scholar - Wolfram, C. D. (1998). Strategic bidding in a multiunit auction: An empirical analysis of bids to supply electricity in England and Wales.
*The Rand Journal of Economics*,*29*(4), 703–725.CrossRefGoogle Scholar - Wolfram, C. D. (1999). Measuring duopoly power in the British electricity spot market.
*American Economic Review*,*89*(4), 805–826.CrossRefGoogle Scholar - Zöttl, G. (2011). On optimal scarcity prices.
*International Journal of Industrial Organization*,*29*(5), 589–605.CrossRefGoogle Scholar