The use of carbon-intense fuels by the power sector contributes significantly to the greenhouse gas emissions of most countries. For this reason, the sector is often key to initial efforts to regulate emissions. But how long does it take before new regulatory incentives result in a switch to...

Hospitals play a key role in patient outcomes and spending, but efforts to improve their quality are hindered because we do not know whether hospital quality indicators are causal or biased. We evaluate the validity of commonly used quality indicators, such as mortality, readmissions, inpatient...

There has been an increasing focus on exclusionary zoning; particularly in suburban areas, as a cause of the high house prices in many metropolitan areas in the United States. Most of the recent evidence, though, is indirect given the difficulty of isolating the direct causal impact of zoning on...