In the process of regulatory reform in the electric power industry, the mitigation of market power is one of the basic problems regulators have to deal with. We use experimental data to study the sources of market power with supply function competition, akin to the competition in wholesale...

This paper quantifies the degree of market power in the German wholesale electricity market. A fundamental model is used to derive competitive marginal cost estimators which are compared with observed electricity prices. Marginal costs are calculated focusing on market fundamentals such as plant...

This paper shows that generators exercised increasing market power in the England and Wales wholesale electricity market in the second half of the 1990s despite declining market concentration. It examines whether this was consistent with static, non-cooperative oligopoly models, which are widely...

Estimating market power is often complicated by a lack of reliable marginal cost data. Instead, policy-makers often rely on summary statistics of the market, thought to be correlated with price cost margins? such as concentration ratios or the HHI. In many industries, these summary statistics...

In this paper a model based analysis of competition in the German wholesale electricity market is presented. Applying a multi-regional model which covers the interregional transmission constraints between Germany and its neighboring countries, potential for exercising market power by the four...

We review the recent empirical research concerning market power on the Nordic wholesale market for electricity, Nord Pool. There is no evidence of blatant and systematic exploitation of system level market power on Nord Pool. However, generation companies seem from time to time able to take...

The Philippine electricity market is in a period of transition as the restructuring provisions of the Electric Power Industry Reform Act (EPIRA) of 2001 are being implemented. Under current structure, the market is highly concentrated, indicating the existence of market power. In addition, many...

As with other commodities, electricity is often traded on both forward and spot markets. This was initially true in the restructured California electricity industry from 1998 to 2000. Though the power traded in the forward and spot markets was for delivery at the same times and locations, prices...