Mark V. Pauly 
Doctors and Their Workshops [PDF ebook] 
Economic Models of Physician Behavior

Doctors are obviously influential in determining the costs of their services. But even more important, many believe, is the influence physicians have over the use and cost of nonphysician health-care resources and services. Doctors and Their Workshops is the first comprehensive attempt to use economic analysis to understand some of the physician effects on nonphysician aspects of health care.