The Medicare program, which provides insurance coverage to the elderly in the United States, does not protect them fully against high out-of-pocket costs. For this reason private supplementary insurance, named Medigap, has been available to cover Medicare gaps. This paper studies how Medigap...

If doctors take the costs of treatment into account when prescribing medication, their objectives differ from their patients' objectives because the patients are insured. This misalignment of interests hampers communication between patient and doctor. Giving cost incentives to doctors increases...

We study priority-based matching markets with public and private endowments. We show that efficiency-adjusted deferred acceptance (EADA) is justified-envy minimal in the class of efficient mechanisms, while Top trading cycles (TTC) and other popular mechanisms are not. Our findings highlight...

I study the economic value of obesity - a seemingly inconsequential but unhealthy status symbol in poor countries. Randomizing decision-makers in Kampala, Uganda to view weight-manipulated portraits, I make four findings. First, obesity is perceived as a reliable signal of wealth rather than...

Randomized experiments (REs) are viewed as the "gold standard" for the treatment evaluation, but many REs are plagued by attrition or non-compliance, even among subjects receiving the more effective treatment. This paper constructs an economic model of decision-making in which individuals make...

We study the design of social long-term care (LTC) insurance when informal care is exchange-based. Parents do not observe their children's cost of providing care, which is continuously distributed over some interval. They choose a rule specifying transfers that are conditional on the level of...

We examine a situation where efforts on different tasks positively affect production but are not separately verifiable and where the manager (principal) and the worker (agent) have different ideas about how production should be carried out: agents prefer a less efficient way of production. We...

This essay surveys the body of research that asks how the efficiency of corporate investment is influenced by problems of asymmetric information and agency. I organize the material around two basic questions. First, does the external capital market channel the right amount of money to each firm?...

This working paper was written by Max Bruche (Humboldt University of Berlin) and John C.F. Kuong (INSEAD).We consider a model in which dealers intermediate trades between clients and provide immediacy, or, market liquidity. Dealers can exert unobservable effort to improve the chance of...