Dranove, David; Gron, Anne; Mazzeo, Michael J. - In: Journal of Industrial Economics 51 (2003) 4, pp. 433-454
This paper examines how differentiation among Health Maintenance Organizations (HMOs) affects local market competition. Most markets for HMOs appear sufficiently unconcentrated; however, differences among HMOs may make competition less intense than the number of competitors would suggest. To...