In the linear coinsurance problem, examined first by Mossin (1968), a higher absolute risk aversion with respect to wealth in the sense of Arrow–Pratt implies a higher optimal coinsurance rate. We show that this property does not hold for health insurance under ex post moral hazard; i.e., when...

In times of ever-rising health expenditures it is becoming more and more obvious that conventional models for funding health care are increasingly experiencing difficulties in meeting up this challenge. The concept of Medical Savings Accounts (MSAs) represents an innovative and so far rarely...

Anecdotal evidence suggests that the loss of health insurance results in changes in health behavior that reduces the risk or severity of illness. While ex ante moral hazard is nearly always mentioned as a potential consequence of health insurance, it is equally as often noted that ex ante moral...

Health insurance reform in Massachusetts lowered the financial cost of both pregnancy (by increased coverage of pregnancy-related medical events) and pregnancy prevention (by increasing access to reliable contraception and family planning). We examine fertility responses for women of...

We study an important mechanism underlying employee referrals into informal low skilled jobs in developing countries. Employers can exploit social preferences between employee referees and potential workers to improve discipline. The profitability of using referrals increases with referee stakes...

We suggest an explanation for the existence of "mission drift", the tendency for Microfinance Institutions (MFIs) to lend money to wealthier borrowers rather than to the very poor. We focus on the relationship between MFIs and external funding institutions. We assume that both the MFIs and the...

We suggest an explanation for the existence of “mission drift”, the tendency for Microfinance Institutions (MFIs) to lend money to wealthier borrowers rather than to the very poor. We focus on the relationship between MFIs and external funding institutions. We assume that both the MFIs and...