When Does Regulation Distort Costs? Lessons from Fuel Procurement in US Electricity Generation

This paper evaluates changes in fuel procurement practices by coal-and gas-fired power plants in the United States following state-level legislation that ended cost-of-service regulation of electricity generation. I find that deregulated plants substantially reduce the price paid for coal (but not gas) and tend to employ less capital-intensive sulfur abatement techniques relative to matched plants that were not subject to any regulatory change. Deregulation also led to a shift toward more productive coal mines. I show how these results lend support to theories of asymmetric information, capital bias, and regulatory capture as important sources of regulatory distortion. (JEL L51, L71, L94, L98, Q35, Q41, Q48)