We create a dataset of 14,000 hand–coded help–wanted advertisements placed by employment agencies in three U.S. newspapers in 1950 and 1960, a time when help–wanted advertisements were divided into male and female sections, and collect information on agency ownership. We find that...

The past century witnessed a dramatic improvement in public health, the rise of modern medicine, and the transformation of the hospital from a fringe institution to one essential to the practice of medicine. Despite the central role of medicine in contemporary society, little is known about how...