The US spends more than 4 trillion dollars per year on health care, largely conducted by private providers and reimbursed by insurers. A major concern in this system is overbilling, waste and fraud by providers, who face incentives to misreport on their claims in order to receive higher...

Audits are a common mechanism used by governments to monitor public spending. In this paper, we discuss the effectiveness of auditing with theory and empirics. In our model, the value of audits depends on both the underlying presence of abuse and the government's ability to observe it and...

Relational contracts - informal self-enforcing agreements sustained by repeated interactions - are ubiquitous both within and across organizational boundaries. This review highlights recent empirical contributions in selected areas. We begin by reviewing some recent work that explicitly takes...

This paper studies the predictability of long-term unemployment (LTU) and analyzes its main determinants using rich administrative data in Sweden. Compared to using standard socio-demographic variables, the predictive power more than doubles when leveraging the rich data environment. The largest...

We pose the problem of managing the interstate as an optimal capital stock problem and define user cost as the charge per vehicle mile travelled that rationalizes observed investments in lane miles and pavement quality. We find that user cost is the sum of the opportunity cost of lane miles,...

We examine mortality differences between Americans with and without a four-year college degree over the period 1992 to 2021. From 1992 to 2010, both groups saw falling mortality, but with greater improvements for the more educated; from 2010 to 2019, mortality fell for those with a BA and rose for...

Despite the well-established importance of verbal engagement for infant language and cognitive development, many parents in low-income contexts do not converse with their infants regularly. We report on a randomized field experiment evaluating a low-cost intervention that aims to raise verbal...