Since Freeman and Medoff's (1984) comprehensive review of what unions do, union density in the U.S. has fallen substantially. During the same period, employer provision of health insurance has undergone substantial changes in extent and form. Using individual data from various supplements to the...

We investigate the effects of employer-provided health insurance on the labor supply of married women. Because health benefits commonly are restricted to full-time workers, wives who prefer to work short hours but have no alternate source of insurance may work long hours in order to acquire...