IPCC (2022) documents a looming gap between climate goals and implemented policies and points to a lack of political commitment. We study policymakers' incentives to commit. A policymaker decides on a policy to encourage citizens to make investments and determines the degree of flexibility to...

Due to taxes and subsidies, gasoline prices vary dramatically across countries. Externalities cannot fully account for this. We develop a simple political economic model that shows that group interests, resulting from the composition of a country's car fleet, help to explain differences in...