We study optimal contracts in a regulator-agent setting with joint production, altruistic and selfish agents, and uneasy outcome measurement. Such a setting represents sectors of activities such as education and health care provision. The agents and the regulator jointly produce an outcome for...

In theory, health care providers may adapt their professional behavior to the financial incentives driven by their remuneration. Our research question is whether the users of health care services anticipate such a behavior from their general practitioner (GP) and, if they do, what are the...