Given R S
California Medical Association, San Francisco 94120, USA.
J Health Econ. 1996 Dec;15(6):685-713. doi: 10.1016/s0167-6296(96)00500-0.
This paper tests for the existence and magnitude of economies of scale and scope as possible explanations for the recent observed trends in increasing health maintenance organization (HMO) scale (through merger and acquisition) and scope (through greater participation in public enrollee markets) using firm level data from a sample of California HMOs for the time period 1986-1992. The results suggest that economies of scale provide a strong justification for mergers only in the case of relatively small HMOs (i.e. those with fewer than 115,000 enrollees), and economies of scope do not explain the increasing HMO enrollment of public enrollees.
本文利用1986 - 1992年期间加利福尼亚健康维护组织（HMO）样本的公司层面数据，检验规模经济和范围经济的存在性及规模大小，以此作为对近期观察到的HMO规模增加（通过并购）和范围扩大（通过更多参与公共参保人市场）趋势的可能解释。结果表明，规模经济仅在相对较小的HMO（即参保人数少于115,000人的HMO）情况下为合并提供了有力依据，而范围经济并不能解释公共参保人HMO参保人数的增加。
