Measures to contain the spread of the coronavirus require a general willingless to cooperate. In how far are the Germans motivated to abide by government regulations? Are measures based on voluntary compliance more effective, or do they need to be enforced and controlled? We investigate these questions with regard to limits on social contacts and traveling, wearing masks, apps for contact tracing, and readiness to get vaccinated. Our study aims to add to an ongoing debate in behavioral economics on the observation that incentives not only reinforce, but may also reduce cooperative behavior.