2005年-世界发展银行全球_Managing_Unilateral_Market_Power_in_Electricity_27页_615kb

Managing Unilateral Market Power in Electricity

Core Content

This paper, authored by Frank A. Wolak from Stanford University, discusses the challenges of managing unilateral market power in wholesale electricity markets and argues for the necessity of an industry-specific regulator to complement conventional competition law. The author emphasizes that the unique characteristics of the electricity industry—such as the inelasticity of demand, the need for real-time supply-demand balance, and the reliance on a common transmission network—make it particularly vulnerable to market power abuses that can significantly harm consumers.

Main Points

• Unilateral Market Power in Electricity: Unlike other industries, electricity suppliers can exert substantial market power even without coordination. This is due to the inelastic nature of wholesale demand, the physical constraints of the transmission network, and the geographic concentration of generation capacity.

• Need for an Industry-Specific Regulator: Conventional antitrust laws are insufficient to protect electricity consumers. An industry-specific regulator is needed to address the unique features of electricity markets and ensure system reliability and market efficiency.

• Regulatory Role: The regulator must anticipate and address market design flaws that could lead to harmful market outcomes. It should also enforce market rules that prevent the exercise of unilateral market power and ensure that market participants act in a way that supports competitive conditions.

• Market Power Mitigation (LMPM): Local market power mitigation mechanisms are essential in wholesale electricity markets. These mechanisms help prevent suppliers from exploiting their market power to inflate prices and harm consumers.

• Forward Contracting and Spot Price Risk: Retailers must be incentivized to engage in forward contracting to hedge against spot price volatility. Regulatory intervention is necessary to ensure that retailers do not over-rely on the spot market, which can lead to significant consumer harm.

• Regulatory Challenges in the US: The US has faced significant issues with spot price volatility due to the Federal Energy Regulatory Commission (FERC) imposing low bid caps and automatic mitigation procedures. This has reduced the incentive for retailers to hedge, leading to potential market instability.

• Benefits of Regulatory Oversight: Regulatory oversight of the transmission network can enhance market competitiveness by facilitating the interconnection of new generation units and enabling transmission upgrades that support more independent suppliers.

Key Information

• Market Characteristics: Electricity supply is subject to real-time balance, high storage costs, and extreme capacity constraints. These factors make it difficult to apply conventional competition policies.

• Market Design Flaws: Certain market design flaws, such as insufficient forward contracting, can be relatively benign under normal conditions but lead to severe consumer harm when system conditions favor the exercise of market power.

• Regulatory Responsibilities:

  • To prevent the degradation of system reliability and market efficiency.
  • To enforce market rules that prohibit harmful unilateral behavior.
  • To implement mitigation mechanisms such as bid caps and automatic mitigation procedures.
  • To monitor and adjust market rules to ensure competitiveness.
  • To provide incentives for forward contracting and limit spot price exposure.

• Case Studies:

  • The California electricity market experienced significant price spikes due to local market power, despite the absence of coordinated actions among suppliers.
  • The US and New Zealand have seen retailer bankruptcies due to over-reliance on spot markets, highlighting the need for regulatory intervention.

• Recommendations:

  • Establish a pre-specified regulatory process that anticipates potential harms and provides clear rules for market participants.
  • Define market manipulation in the context of electricity markets, focusing on intent rather than just behavior.
  • Implement forward contracting requirements to ensure market stability and consumer protection.
  • Encourage transparency and clarity in market rules to improve enforceability and reduce the risk of system reliability issues.

Conclusion

The paper concludes that while it is impossible to eliminate all market power in electricity markets, a well-designed regulatory process can significantly reduce the economic harm caused by its exercise. This process should be self-correcting, proactive, and tailored to the specific features of the electricity industry to ensure long-term market efficiency and reliability.