PublicationsWorking PapersWork in progressBook Chapters and Policy Reports

Research Statement


Fabra, N. (2018) “A Primer on Capacity Mechanisms“, Energy Economics 75, 323-335.

Fabra, N. and García, A. (2015) “Dynamic Price Competition with Switching Costs”
Dynamic Games and Applications 5 (4), 540-567.

Fabra, N. and García, A. (2015) “Market Structure and the Competitive Effects of Switching Costs” Economics Letters 126, 150-155.

Fabra, N. and Reguant, M. (2014) “Passthrough of Emission Costs in Electricity Markets”
American Economic Review 104(9), 2872-2899.
Extended abstract
Highlighted in the NBER Digest, March 2014
Highlighted at Nature Climate Change  4, 860, October 2014

De Frutos, M.A. and Fabra, N. (2012) “How to Allocate Forward Contracts: the case of electricity markets” European Economic Review 56(3), 451-469.

Fabra, N., N.H. von der Fehr and M.A. De Frutos, M.A. (2011) “Market Design and Investment Incentives” Economic Journal 121, 1340–1360.

De Frutos, M.A. and Fabra, N. (2011) “Endogenous Capacities and Price Competition: the Role of Uncertainty” International Journal of Industrial Organization 29(4), 399-411.

Campos, E., N. Fabra and García, A. (2007) “Dynamic Auctions for On-demand Services” IEEE Transactions on Systems Man and Cybernetics 37 (6), 878-886.

Fabra, N. and Creti, A. (2007) “Supply Security and Short-Run Capacity Markets for Electricity” Energy Economics 29(2), 259-276.

Fabra, N. (2006) “Collusion with Capacity Constraints over the Business Cycle” International Journal of Industrial Organization 24(1), 69-81.

Fabra, N., and Toro, J. (2005) “Price Wars and Collusion in the Spanish Electricity Market” International Journal of Industrial Organization 23(3), 155-181.

Fabra, N., N.H. von der Fehr and Harbord, D. (2006) “Designing Electricity Auctions” Rand Journal of Economics 37 (1), 23-346.

Crampes, C. and Fabra, N. (2005) “The Spanish Electricity Industry: Plus ca change…” The Energy Journal 26.

Fabra, N. (2003) “Tacit Collusion in Repeated Auctions: Uniform versus Discriminatory auctions” Journal of Industrial Economics L1(3), 271-293.

Fabra, N., N.H. von der Fehr and Harbord, D. (2002) “Modelling Electricity Auctions” Electricity Journal 15(7), 72-81.

Working Papers

“Auctions with Unknown Capacities: Understanding Competition among Renewables with Gerard Llobet (June 2019)

We analyse equilibrium bidding behaviour in uniform-price auctions in which each firm’s capacity is stochastic and is private information. We use the model to shed light on the performance of renewables-dominated electricity markets.

Incentives for Information Provision: Energy Efficiency in the Spanish Rental Market with Xueying Bian  (August 2019) New version!

We build a search mode with asymmetric information regarding houses’ energy efficiency. We show that the incentives to disclose energy efficiency labels in the rental market depend on the rent premium for more efficient houses but also on the rent penalty for unlabeled houses. The latter is increasing in the adoption rate of energy certificates in the local market. We provide empirical evidence of these predictions in the context of the Spanish rental market.

CEPR Discussion Paper 13270

A Model of Search with Price Discrimination with Mar Reguant (August 2019) New version!

We explore the interaction between price discrimination and competition in markets with search costs. We build a search model in which consumers differ in their willingness to pay as well as in their (private) search costs. Buyers’ willingness to pay shape their willingness to search, thus affecting the intensity of competition among firms for the various consumers. We provide a parametrization under which a ban on price discrimination is overall welfare improving.

A previous version of this paper was published as a CEPR Discussion Paper 12823

Product Choice and Price Discrimination by Competing Firms with Juan Pablo Montero (September 2019) New version!

In a model of quality choices followed by price competition, we show that an arbitrarily small amount of search frictions is enough to rule out equilibria with non-overlapping qualities. In equilibrium, firms’ product lines overlap for all values of the search friction. This is the opposite to what occurs when horizontal differentiation is the source of market frictions: the equilibrium with non-overlapping qualities, which results in weak competition across firms, survives the introduction of small amounts of product differentiation. Therefore, the nature of market frictions is key to understand product choice and thus the tension between price discrimination and competition.

A previous version of this paper was published as a CEPR Discussion Paper 12046 [Slides]

Antitrust Fines in Times of Crisis” with Massimo Motta (January 2013)
CEPR Discussion Paper 9290 

Work in Progress

“Prices versus Quantities with Multiple Technologies” (with Juan Pablo Montero)

“Market Power with Prices Caps and Price Floors: An Empirical Analysis of Strategic Bidding by Wind Producers” (with Imelda Wang)

“Promoting the Electric Vehicle: the Value of Low-Emissions Zones” (with Juan Pablo Montero)

The Economics of Strategic Energy Storage” (with David Andrés-Cerezo)

We asses firms’ incentives to operate and invest in electricity storage facilities under different market structures, including competitive and strategic storage owners in the cases in which the storage owner is integrated with a dominant electricity producer or it is a stand-alone firm. The results are key to understand how to regulate electricity storage, an issue which is critical for the deployment of renewables in electricity markets.

“On the Competitive Effects of Retention Strategies”

Retention offers allow firms to price discriminate across consumers with different willingness to switch: prices decrease for those consumers who are more likely to switch, but increase for those who are less likely to switch. In competitive markets, retention offers strengthen competitive pressure. However, if markets are not very competitive, they make them even less so.

Book Chapters

Fabra, N. and Motta, M. (2017) “Assessing Coordinated Effects in Merger Cases
Handbook of Game Theory and Industrial Organization, (Corchon and Marini Eds.) Edward Elgar.

Policy Reports

In English:

Fabra, N., Matthes, F., Newbery, D. and Rüdinger, A. (2015) “The Energy Transition In Europe: Lessons from Germany, the UK and France
A CERRE report

Fabra, N., Moraga, J.L. (2015) “Energy security and sustainability:what role for gas in the Energy Union?
A CERRE Discussion Paper

Fabra, N. and M. Motta (2013) “Coordinated Effects in Merger Cases
A report for the Mexican Competition Authority and the World Bank

Courty, P., N. Fabra, C. Fumagalli, M. Motta (2004) “Identical Price Categories in Oligopolistic Markets: Innocent Behaviour or Collusive Practice?
A report for the Italian Competition Authority

In Spanish:

Fabra, N. (2018) “Mercados eléctricos y mecanismos de capacidad: cuándo, cómo y por quéPapeles de Energía nº6, 53-76

Fabra, N. (2018) “La Transición Energética en el Sector Eléctrico: un imperativo para el medio ambiente y para la economía” Cuaderno de Trabajo Transición energética en España – Una propuesta desde la socialdemocracia, Fundación Pablo Iglesias

Fabra, N. (2018) “La Unión Energética: Instrumento para la Transición Energética en Europa” Revista de Economía ICE

Fabra, N. (2014) “Funcionamiento y Diseño de los Mercados Eléctricos: ¿Qué nos enseña la Teoría de Juegos?
Economía Industrial 393, 25-32

Fabra, N, J.P. Montero, and M. Reguant (2013) “Competencia en el Mercado Eléctrico Chileno”
A report for the Fiscalía Nacional Económica de Chile

Fabra, N. and J. Fabra Utray (2012) “El Déficit Tarifario en el Sector Eléctrico Español
Papeles de Economía Española 134

Fabra, N. and J. Fabra Utray (2010) “Competencia y Poder de Mercado en los Mercados Eléctricos
Cuadernos Económicos del ICE 79, pp. 17-43

Fabra, N. (2010) “Modelo Energético Sostenible
Chapter 17 in “La Ley de Economía Sostenible y la Reformas Estructurales: 25 propuestas”, FEDEA

Fabra, N. and J. Fabra Utray (2009) “Un Diseño de Mercado para el Sector Eléctrico Español
Papeles de Economía Española 121, 141-158

Fabra, N. “El Funcionamiento del Mercado Eléctrico Español bajo la Ley del Sector Eléctrico”.
Chapter 10 in “Del Monopolio al Mercado. La Comisión Nacional de Energía: diez años en perspectiva”.

Fabra, N. (2006) “La Electricidad: Mercados, Inversiones, y Garantía de Suministro”
Economía Industrial 364, 63-74