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The Policy Research Working Paper Series disseminates the findings of work in progress to encourage the exchange of ideas about development issues. An objective of the series is to get the findings out quickly, even if the presentations are less than fully polished.

Regulation is an information problem. In this paper we show that benchmarking can have an important role to play in extracting information and providing efficiency incentives. However, the effectiveness of this role depends both on the credibility of the regulator to undertake a comparative efficiency analysis, and the impact of the benchmarking on the value of the firm. These are both affected by the policy framework within which the regulator operates. In Britain the regulator is not obliged to undertake any benchmarking, and the impact of the benchmarking that has been undertaken has been relatively low. These conditions have the effect of diminishing incentives for both information provision by the companies and model developments by the regulator. In the Netherlands, the impact on business value is high because benchmarking sets the price differentials from which a yardstick competition model – required by law – is implemented. These twin conditions of high credibility and high impact on value both sharpen incentives for the businesses to reveal information at the time of the benchmarking and also provide a stimulus for the regulator to properly account for firm-specific effects. In Austria, where similar conditions to the Netherlands have been established, we described the regulator's attempts to improve the robustness of the cost drivers in the model.

The Policy Research Working Paper Series disseminates the findings of work in progress to encourage the exchange of ideas about development issues. An objective of the series is to get the findings out quickly, even if the presentations are less than fully polished. The papers carry the names of the authors and should be cited accordingly. The findings, interpretations, and conclusions expressed in this paper are entirely those of the authors. They do not necessarily represent the view of the World Bank, its Executive Directors, or the countries they represent.