I consider the efficiency of liability rules when courts obtain imperfect information about precautionary behavior. I ask what tort rules are consistent with socially efficient precautions, what informational requirements the evidence about the parties' behavior must satisfy, what decision rules...

We use de-identified data from California personal income tax returns to measure the frequency and nature of independent contracting and self-employment work in California. We identify this work by the presence of a Schedule C on the tax return and/or the receipt of a Form 1099 information...

Teamwork has become more important in recent decades. We show that larger teams generate an unintended side effect: individuals who finish their PhD when the average team in their field is larger have worse career prospects. Our analysis combines data on career outcomes from the Survey of...

Using more than 4,900 assessments, we study changes in the characteristics and objectives of CEOs and top executives since 2001. The same four factors explain roughly half of the variation of assessed CEO characteristics in this larger sample of executive assessments as in Kaplan and Sorensen...

This paper constructs a dynamic model of health insurance to evaluate the short- and long run effects of policies that prevent firms from conditioning wages on health conditions of their workers, and that prevent health insurance companies from charging individuals with adverse health conditions...

We analyze the complementarity between legal incentives (the threat of being held liable for damages) and normative incentives (the fear of social disapproval or stigma) in situations where instances of misbehavior are not perfectly observable. There may be multiple equilibria within a given...

I examine the case where fulfillment of a contractual commitment is only imperfectly verifiable and ask whether the court should then "tell the truth" regarding the action in dispute. I show that truth seeking does not maximize the expected surplus from contractual relationships. From the...