During the COVID-19 pandemic, governments offered financial incentives to increase vaccine uptake. We evaluate the impact on COVID-19 vaccine uptake of cash equivalents versus being entered into lotteries. We randomly assign 1628 unvaccinated US participants into one of three 45-second...

This paper asks whether lawyers respond to financial incentives in ways that are consistent with predictions from contract theory. It uses data collected from before/after the introduction of standard fees for legal aid lawyers in England and Wales. For some inputs (not all), these substituted...