IDEAS home Printed from https://ideas.repec.org/a/eee/enepol/v163y2022ics0301421522000416.html
   My bibliography  Save this article

Price spikes, temporary price caps, and welfare effects of regulatory interventions on wholesale electricity markets

Author

Listed:
  • Sirin, Selahattin Murat
  • Erten, Ibrahim

Abstract

There is growing empirical evidence of increasing price volatility and price spikes in electricity markets as a result of variable renewable energy generation, extreme weather events, and other factors. While price spikes are needed to cover the fixed costs of power plants, they may also signal market flaws and anti-competitive behavior. Regulatory authorities have imposed market price caps to protect consumers and prevent abusive supplier behavior. In addition, some regulators have imposed temporary price caps during or after severe events; however, these caps may be driven by political motives rather than economic logic in weak institutional settings. This paper evaluates the welfare effect of the temporary price cap implemented in 2017 on the Turkish electricity market. By using matching and panel data methods, we show that the temporary price cap reduced the total welfare but did not affect market clearing price and projected supply. Our detailed analysis shows that this decision was driven by non-economic motives, and identifies a number of fundamental problems in the Turkish market that limit the effective functioning of the market.

Suggested Citation

  • Sirin, Selahattin Murat & Erten, Ibrahim, 2022. "Price spikes, temporary price caps, and welfare effects of regulatory interventions on wholesale electricity markets," Energy Policy, Elsevier, vol. 163(C).
    • Handle: RePEc:eee:enepol:v:163:y:2022:i:c:s0301421522000416
    DOI: 10.1016/j.enpol.2022.112816
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0301421522000416
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.enpol.2022.112816?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. Robert Earle & Karl Schmedders & Tymon Tatur, 2007. "On Price Caps Under Uncertainty," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 74(1), pages 93-111.
    2. Natalia Fabra & Nils‐Henrik Fehr & David Harbord, 2006. "Designing electricity auctions," RAND Journal of Economics, RAND Corporation, vol. 37(1), pages 23-46, March.
    3. Christopher F Baum & Mark E. Schaffer & Steven Stillman, 2003. "Instrumental variables and GMM: Estimation and testing," Stata Journal, StataCorp LP, vol. 3(1), pages 1-31, March.
    4. Paul Joskow & Jean Tirole, 2007. "Reliability and competitive electricity markets," RAND Journal of Economics, RAND Corporation, vol. 38(1), pages 60-84, March.
    5. repec:dau:papers:123456789/14506 is not listed on IDEAS
    6. Natalia Fabra & Nils-Henrik M. von der Fehr & David Harbord, 2006. "Designing Electricity Auctions," RAND Journal of Economics, The RAND Corporation, vol. 37(1), pages 23-46, Spring.
    7. Sirin, Selahattin Murat & Yilmaz, Berna N., 2021. "The impact of variable renewable energy technologies on electricity markets: An analysis of the Turkish balancing market," Energy Policy, Elsevier, vol. 151(C).
    8. Sophie Méritet & Thao Pham, 2015. "Market Power In Power Markets: The Case Of French Wholesale Electricity Market," Post-Print hal-02876674, HAL.
    9. Holmberg, Pär & Newbery, David, 2010. "The supply function equilibrium and its policy implications for wholesale electricity auctions," Utilities Policy, Elsevier, vol. 18(4), pages 209-226, December.
    10. Stanley S. Reynolds & David Rietzke, 2018. "Price caps, oligopoly, and entry," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 66(3), pages 707-745, October.
    11. Daron Acemoglu, Ali Kakhbod, and Asuman Ozdaglar, 2017. "Competition in Electricity Markets with Renewable Energy Sources," The Energy Journal, International Association for Energy Economics, vol. 0(KAPSARC S).
    12. Damianov, Damian S. & Oechssler, Jörg & Becker, Johannes Gerd, 2010. "Uniform vs. discriminatory auctions with variable supply - experimental evidence," Games and Economic Behavior, Elsevier, vol. 68(1), pages 60-76, January.
    13. Jan Ditzen, 2018. "Estimating dynamic common-correlated effects in Stata," Stata Journal, StataCorp LP, vol. 18(3), pages 585-617, September.
    14. M. Hashem Pesaran, 2007. "A simple panel unit root test in the presence of cross-section dependence," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 22(2), pages 265-312.
    15. Lê, Sébastien & Josse, Julie & Husson, François, 2008. "FactoMineR: An R Package for Multivariate Analysis," Journal of Statistical Software, Foundation for Open Access Statistics, vol. 25(i01).
    16. Sirin, Selahattin Murat & Yilmaz, Berna N., 2020. "Variable renewable energy technologies in the Turkish electricity market: Quantile regression analysis of the merit-order effect," Energy Policy, Elsevier, vol. 144(C).
    17. Erin T. Mansur, 2008. "Measuring Welfare in Restructured Electricity Markets," The Review of Economics and Statistics, MIT Press, vol. 90(2), pages 369-386, May.
    18. Derek Bunn & Fernando Oliveira, 2003. "Evaluating Individual Market Power in Electricity Markets via Agent-Based Simulation," Annals of Operations Research, Springer, vol. 121(1), pages 57-77, July.
    19. Newbery, D., 2008. "Predicting market power in wholesale electricity markets," Cambridge Working Papers in Economics 0837, Faculty of Economics, University of Cambridge.
    20. Christian Vossler & Timothy Mount & Robert Thomas & Ray Zimmerman, 2009. "An experimental investigation of soft price caps in uniform price auction markets for wholesale electricity," Journal of Regulatory Economics, Springer, vol. 36(1), pages 44-59, August.
    21. Newbery, David, 2016. "Missing money and missing markets: Reliability, capacity auctions and interconnectors," Energy Policy, Elsevier, vol. 94(C), pages 401-410.
    22. Marco Caliendo & Sabine Kopeinig, 2008. "Some Practical Guidance For The Implementation Of Propensity Score Matching," Journal of Economic Surveys, Wiley Blackwell, vol. 22(1), pages 31-72, February.
    23. Severin Borenstein & James Bushnell, 2015. "The US Electricity Industry After 20 Years of Restructuring," Annual Review of Economics, Annual Reviews, vol. 7(1), pages 437-463, August.
    24. Paul L. Joskow, 2001. "California's Electricity Crisis," Oxford Review of Economic Policy, Oxford University Press and Oxford Review of Economic Policy Limited, vol. 17(3), pages 365-388.
    25. Thomaidis, Nikolaos S. & Biskas, Pandelis N., 2021. "Fundamental pricing laws and long memory effects in the day-ahead power market," Energy Economics, Elsevier, vol. 100(C).
    26. Ramteen Sioshansi & Shmuel Oren, 2007. "How good are supply function equilibrium models: an empirical analysis of the ERCOT balancing market," Journal of Regulatory Economics, Springer, vol. 31(1), pages 1-35, February.
    27. Mayer, Klaus & Trück, Stefan, 2018. "Electricity markets around the world," Journal of Commodity Markets, Elsevier, vol. 9(C), pages 77-100.
    28. Ignacio J. Pérez-Arriaga, Jesse D. Jenkins, and Carlos Batlle, 2017. "A regulatory framework for an evolving electricity sector: Highlights of the MIT utility of the future study," Economics of Energy & Environmental Policy, International Association for Energy Economics, vol. 0(Number 1).
    29. Crawford, Gregory S. & Crespo, Joseph & Tauchen, Helen, 2007. "Bidding asymmetries in multi-unit auctions: Implications of bid function equilibria in the British spot market for electricity," International Journal of Industrial Organization, Elsevier, vol. 25(6), pages 1233-1268, December.
    30. David P. Brown & Derek E. H. Olmstead, 2017. "Measuring market power and the efficiency of Alberta's restructured electricity market: An energy‐only market design," Canadian Journal of Economics/Revue canadienne d'économique, John Wiley & Sons, vol. 50(3), pages 838-870, August.
    31. Kahn, Alfred E., 2002. "The Adequacy of Prospective Returns on Generation Investments under Price Control Mechanisms," The Electricity Journal, Elsevier, vol. 15(2), pages 37-46, March.
    32. Fridolfsson, Sven-Olof & Tangerås, Thomas P., 2009. "Market power in the Nordic electricity wholesale market: A survey of the empirical evidence," Energy Policy, Elsevier, vol. 37(9), pages 3681-3692, September.
    33. Im, Kyung So & Pesaran, M. Hashem & Shin, Yongcheol, 2003. "Testing for unit roots in heterogeneous panels," Journal of Econometrics, Elsevier, vol. 115(1), pages 53-74, July.
    34. Ali Hortaçsu & Steven L. Puller, 2008. "Understanding strategic bidding in multi‐unit auctions: a case study of the Texas electricity spot market," RAND Journal of Economics, RAND Corporation, vol. 39(1), pages 86-114, March.
    35. Thao Pham, 2019. "Market Power Issues in Liberalized Wholesale Electricity Markets: A Review of the Literature with a Look into the Future," Revue d'économie politique, Dalloz, vol. 129(3), pages 325-354.
    36. Christensen, T.M. & Hurn, A.S. & Lindsay, K.A., 2012. "Forecasting spikes in electricity prices," International Journal of Forecasting, Elsevier, vol. 28(2), pages 400-411.
    37. George Kapetanios & M. Hashem Pesaran, 2005. "Alternative Approaches to Estimation and Inference in Large Multifactor Panels: Small Sample Results with an Application to Modelling of Asset Returns," CESifo Working Paper Series 1416, CESifo.
    38. Weron, Rafał, 2014. "Electricity price forecasting: A review of the state-of-the-art with a look into the future," International Journal of Forecasting, Elsevier, vol. 30(4), pages 1030-1081.
    39. Steven L. Puller, 2007. "Pricing and Firm Conduct in California's Deregulated Electricity Market," The Review of Economics and Statistics, MIT Press, vol. 89(1), pages 75-87, February.
    40. Roques, Fabien A. & Savva, Nicos, 2009. "Investment under uncertainty with price ceilings in oligopolies," Journal of Economic Dynamics and Control, Elsevier, vol. 33(2), pages 507-524, February.
    41. repec:qut:auncer:2012_5 is not listed on IDEAS
    42. Wilson, James F., 2000. "Scarcity, Market Power, and Price Caps in Wholesale Electric Power Markets," The Electricity Journal, Elsevier, vol. 13(9), pages 33-46, November.
    43. Sadorsky, Perry, 2014. "The effect of urbanization on CO2 emissions in emerging economies," Energy Economics, Elsevier, vol. 41(C), pages 147-153.
    44. M. Hashem Pesaran, 2006. "Estimation and Inference in Large Heterogeneous Panels with a Multifactor Error Structure," Econometrica, Econometric Society, vol. 74(4), pages 967-1012, July.
    45. Rafael E. De Hoyos & Vasilis Sarafidis, 2006. "Testing for cross-sectional dependence in panel-data models," Stata Journal, StataCorp LP, vol. 6(4), pages 482-496, December.
    46. Paul L. Joskow, 2008. "Lessons Learned from Electricity Market Liberalization," The Energy Journal, International Association for Energy Economics, vol. 0(Special I), pages 9-42.
    47. Catherine D. Wolfram, 1998. "Strategic Bidding in a Multiunit Auction: An Empirical Analysis of Bids to Supply Electricity in England and Wales," RAND Journal of Economics, The RAND Corporation, vol. 29(4), pages 703-725, Winter.
    48. Acar, Berkan & Selcuk, Orhun & Dastan, Seyit Ali, 2019. "The merit order effect of wind and river type hydroelectricity generation on Turkish electricity prices," Energy Policy, Elsevier, vol. 132(C), pages 1298-1319.
    49. Borenstein, Severin, 2000. "Understanding Competitive Pricing and Market Power in Wholesale Electricity Markets," The Electricity Journal, Elsevier, vol. 13(6), pages 49-57, July.
    50. Nahmmacher, Paul & Schmid, Eva & Pahle, Michael & Knopf, Brigitte, 2016. "Strategies against shocks in power systems – An analysis for the case of Europe," Energy Economics, Elsevier, vol. 59(C), pages 455-465.
    51. Paul Twomey & Richard Green & Karsten Neuhoff & David Newbery, 2005. "A Review of the Monitoring of Market Power: The Possible Roles of TSOs in Monitoring for Market Power Issues in Congested Transmission Systems," Working Papers 0502, Massachusetts Institute of Technology, Center for Energy and Environmental Policy Research.
    52. Chloé Coq & Henrik Orzen & Sebastian Schwenen, 2017. "Pricing and capacity provision in electricity markets: an experimental study," Journal of Regulatory Economics, Springer, vol. 51(2), pages 123-158, April.
    53. David Newbery & Tanga McDaniel, 2002. "Auctions and trading in energy markets - an economic analysis," Working Papers EP15, Energy Policy Research Group, Cambridge Judge Business School, University of Cambridge.
    54. Janczura, Joanna & Trück, Stefan & Weron, Rafał & Wolff, Rodney C., 2013. "Identifying spikes and seasonal components in electricity spot price data: A guide to robust modeling," Energy Economics, Elsevier, vol. 38(C), pages 96-110.
    55. Lynne Kiesling & Bart Wilson, 2007. "An experimental analysis of the effects of automated mitigation procedures on investment and prices in wholesale electricity markets," Journal of Regulatory Economics, Springer, vol. 31(3), pages 313-334, June.
    56. Pechan, Anna & Eisenack, Klaus, 2014. "The impact of heat waves on electricity spot markets," Energy Economics, Elsevier, vol. 43(C), pages 63-71.
    57. Malani, Anup & Reif, Julian, 2015. "Interpreting pre-trends as anticipation: Impact on estimated treatment effects from tort reform," Journal of Public Economics, Elsevier, vol. 124(C), pages 1-17.
    58. King, Gary & Nielsen, Richard, 2019. "Why Propensity Scores Should Not Be Used for Matching," Political Analysis, Cambridge University Press, vol. 27(4), pages 435-454, October.
    59. Brown, David P., 2018. "Capacity payment mechanisms and investment incentives in restructured electricity markets," Energy Economics, Elsevier, vol. 74(C), pages 131-142.
    60. Borenstein, Severin & Bushnell, James & Wolak, Frank, 1999. "Diagnosing Market Power in California's Deregulated Wholesale Electricity Market," Competition Policy Center, Working Paper Series qt3rx965d5, Competition Policy Center, Institute for Business and Economic Research, UC Berkeley.
    61. Severin Borenstein & James B. Bushnell & Frank A. Wolak, 2002. "Measuring Market Inefficiencies in California's Restructured Wholesale Electricity Market," American Economic Review, American Economic Association, vol. 92(5), pages 1376-1405, December.
    62. Christoph Engel & Klaus Heine, 2017. "The dark side of price cap regulation: a laboratory experiment," Public Choice, Springer, vol. 173(1), pages 217-240, October.
    63. Khezr, Peyman & Nepal, Rabindra, 2021. "On the viability of energy-capacity markets under decreasing marginal costs," Energy Economics, Elsevier, vol. 96(C).
    64. Severin Borenstein, 2002. "The Trouble With Electricity Markets: Understanding California's Restructuring Disaster," Journal of Economic Perspectives, American Economic Association, vol. 16(1), pages 191-211, Winter.
    65. Thao Pham, 2019. "Market Power Issues in Liberalized Wholesale Electricity Markets: A Review of the Literature with a Look into the Future," Post-Print hal-02568252, HAL.
    66. Lv, Zhike & Xu, Ting, 2018. "Is economic globalization good or bad for the environmental quality? New evidence from dynamic heterogeneous panel models," Technological Forecasting and Social Change, Elsevier, vol. 137(C), pages 340-343.
    67. Csercsik, Dávid, 2021. "Strategic bidding via the interplay of minimum income condition orders in day-ahead power exchanges," Energy Economics, Elsevier, vol. 95(C).
    68. Xavier Vives, 2001. "Oligopoly Pricing: Old Ideas and New Tools," MIT Press Books, The MIT Press, edition 1, volume 1, number 026272040x, December.
    69. Ho, Daniel & Imai, Kosuke & King, Gary & Stuart, Elizabeth A., 2011. "MatchIt: Nonparametric Preprocessing for Parametric Causal Inference," Journal of Statistical Software, Foundation for Open Access Statistics, vol. 42(i08).
    70. Poletti, Stephen, 2021. "Market Power in the New Zealand electricity wholesale market 2010–2016," Energy Economics, Elsevier, vol. 94(C).
    71. George Kapetanios & M. Hashem Pesaran, 2005. "Alternative Approaches to Estimation and Inference in Large Multifactor Panels: Small Sample Results with an Application to Modelling of Asset Returns," CESifo Working Paper Series 1416, CESifo.
    72. Erin T. Mansur, 2003. "Vertical Integration in Restructured Electricity Markets: Measuring Market Efficiency and Firm Conduct," Yale School of Management Working Papers ysm430, Yale School of Management.
    73. Hach, Daniel & Spinler, Stefan, 2016. "Capacity payment impact on gas-fired generation investments under rising renewable feed-in — A real options analysis," Energy Economics, Elsevier, vol. 53(C), pages 270-280.
    74. Pär Holmberg & Frank A. Wolak, 2018. "Comparing auction designs where suppliers have uncertain costs and uncertain pivotal status," RAND Journal of Economics, RAND Corporation, vol. 49(4), pages 995-1027, December.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Fatras, Nicolas & Ma, Zheng & Duan, Hongbo & Jørgensen, Bo Nørregaard, 2022. "A systematic review of electricity market liberalisation and its alignment with industrial consumer participation: A comparison between the Nordics and China," Renewable and Sustainable Energy Reviews, Elsevier, vol. 167(C).
    2. Kogan, Konstantin & Herbon, Avi, 2022. "Retailing under panic buying and consumer stockpiling: Can governmental intervention make a difference?," International Journal of Production Economics, Elsevier, vol. 254(C).
    3. Sirin, Selahattin Murat & Camadan, Ercument & Erten, Ibrahim Etem & Zhang, Alex Hongliang, 2023. "Market failure or politics? Understanding the motives behind regulatory actions to address surging electricity prices," Energy Policy, Elsevier, vol. 180(C).
    4. Olukunle O. Owolabi & Toryn L. J. Schafer & Georgia E. Smits & Sanhita Sengupta & Sean E. Ryan & Lan Wang & David S. Matteson & Mila Getmansky Sherman & Deborah A. Sunter, 2021. "Role of Variable Renewable Energy Penetration on Electricity Price and its Volatility Across Independent System Operators in the United States," Papers 2112.11338, arXiv.org, revised Nov 2022.
    5. Bikeri Adline & Kazushi Ikeda, 2023. "A Hawkes Model Approach to Modeling Price Spikes in the Japanese Electricity Market," Energies, MDPI, vol. 16(4), pages 1-20, February.
    6. Athanasios Ioannis Arvanitidis & Dimitrios Bargiotas & Dimitrios Kontogiannis & Athanasios Fevgas & Miltiadis Alamaniotis, 2022. "Optimized Data-Driven Models for Short-Term Electricity Price Forecasting Based on Signal Decomposition and Clustering Techniques," Energies, MDPI, vol. 15(21), pages 1-24, October.

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Sirin, Selahattin Murat & Camadan, Ercument & Erten, Ibrahim Etem & Zhang, Alex Hongliang, 2023. "Market failure or politics? Understanding the motives behind regulatory actions to address surging electricity prices," Energy Policy, Elsevier, vol. 180(C).
    2. Sirin, Selahattin Murat & Uz, Dilek & Sevindik, Irem, 2022. "How do variable renewable energy technologies affect firm-level day-ahead output decisions: Evidence from the Turkish wholesale electricity market," Energy Economics, Elsevier, vol. 112(C).
    3. Anderson, Edward & Holmberg, Pär, 2018. "Price instability in multi-unit auctions," Journal of Economic Theory, Elsevier, vol. 175(C), pages 318-341.
    4. Chloé Coq & Henrik Orzen & Sebastian Schwenen, 2017. "Pricing and capacity provision in electricity markets: an experimental study," Journal of Regulatory Economics, Springer, vol. 51(2), pages 123-158, April.
    5. David P. Brown & Derek E. H. Olmstead, 2017. "Measuring market power and the efficiency of Alberta's restructured electricity market: An energy-only market design," Canadian Journal of Economics, Canadian Economics Association, vol. 50(3), pages 838-870, August.
    6. Machiel Mulder, 2015. "Competition in the Dutch Electricity Market: An Empirical Analysis over 2006-2011," The Energy Journal, International Association for Energy Economics, vol. 0(Number 2).
    7. Bohland, Moritz & Schwenen, Sebastian, 2022. "Renewable support and strategic pricing in electricity markets," International Journal of Industrial Organization, Elsevier, vol. 80(C).
    8. David P. Brown & Andrew Eckert, 2018. "Analyzing the Impact of Electricity Market Structure Changes and Mergers: The Importance of Forward Commitments," Review of Industrial Organization, Springer;The Industrial Organization Society, vol. 52(1), pages 101-137, February.
    9. Bajo-Buenestado, Raúl, 2017. "Welfare implications of capacity payments in a price-capped electricity sector: A case study of the Texas market (ERCOT)," Energy Economics, Elsevier, vol. 64(C), pages 272-285.
    10. Holmberg, Pär & Tangerås, Thomas & Ahlqvist, Victor, 2018. "Central- versus Self-Dispatch in Electricity Markets," Working Paper Series 1257, Research Institute of Industrial Economics, revised 27 Mar 2019.
    11. Albert Banal-Estañol & Augusto Rupérez Micola, 2009. "Composition of Electricity Generation Portfolios, Pivotal Dynamics, and Market Prices," Management Science, INFORMS, vol. 55(11), pages 1813-1831, November.
    12. Keppler, Jan Horst & Quemin, Simon & Saguan, Marcelo, 2022. "Why the sustainable provision of low-carbon electricity needs hybrid markets," Energy Policy, Elsevier, vol. 171(C).
    13. Moritz Bohland & Sebastian Schwenen, 2020. "Technology Policy and Market Structure: Evidence from the Power Sector," Discussion Papers of DIW Berlin 1856, DIW Berlin, German Institute for Economic Research.
    14. Pär Holmberg, 2017. "Pro‐competitive Rationing in Multi‐unit Auctions," Economic Journal, Royal Economic Society, vol. 127(605), pages 372-395, October.
    15. Vítor Marques & Isabel Soares & Adelino Fortunato, 2012. "Application of a Structural Model to the Spanish Electricity Wholesale Market," European Research Studies Journal, European Research Studies Journal, vol. 0(4), pages 65-108.
    16. Erin T. Mansur, 2007. "Do Oligopolists Pollute Less? Evidence From A Restructured Electricity Market," Journal of Industrial Economics, Wiley Blackwell, vol. 55(4), pages 661-689, December.
    17. Fabra, Natalia & de Frutos, Maria-Angeles, 2008. "On the Impact of Forward Contract Obligations in Multi-Unit Auctions," CEPR Discussion Papers 6756, C.E.P.R. Discussion Papers.
    18. Fabra, Natalia, 2018. "A primer on capacity mechanisms," Energy Economics, Elsevier, vol. 75(C), pages 323-335.
    19. Holmberg, Pär & Tangerås, Thomas, 2021. "Strategic Reserves versus Market-wide Capacity Mechanisms," Working Paper Series 1387, Research Institute of Industrial Economics.
    20. Sherzod N. Tashpulatov, 2018. "The Impact of Behavioral and Structural Remedies on Electricity Prices: The Case of the England and Wales Electricity Market," Energies, MDPI, vol. 11(12), pages 1-24, December.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:enepol:v:163:y:2022:i:c:s0301421522000416. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.elsevier.com/locate/enpol .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.