A standard test for adverse selection in health insurance examines whether people with characteristics predicting high health care utilization are more likely to buy insurance (or buy more generous nsurance). George Akerlof’s theory of adverse selection suggests a test based on prices:...

I examine the phenomenon of occupational agglomeration – the observation that workers with similar skills tend to co-locate geographically. Extant explanations point to the fact that industries also tend to agglomerate – thereby creating a need for a particular type of employee to...