Is managed care leading to consolidation in health-care markets?

Is managed care leading to consolidation in health-care markets?
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管理式医疗是否会导致医疗保健市场整合?

DOI:
10.1111/1475-6773.00038
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发表时间:
2002
影响因子:
3.4
通讯作者:
White,WilliamD
White,WilliamD
中科院分区:
医学3区
文献类型:
--
作者:
Dranove,David;Simon,CarolJ;White,WilliamD

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目的:确定管理式医疗在多大程度上导致了医院和医生之间的整合。数据来源:我们使用来自美国医院协会、美国医学协会和政府人口普查的数据。研究设计:两阶段最小二乘回归分析考察管理式医疗渗透率的横截面变化如何影响提供者整合,同时控制管理式医疗渗透率的内消。具体而言,我们研究了大都市地区的住院医院市场和医生执业规模。数据收集方法。所有数据均来自二级来源,在主要大都市统计区层面合并。主要发现。我们发现,当地管理式医疗渗透率的提高与医院和医生市场整合的大幅增加相关。在平均市场中(1994年管理式医疗渗透率为34%),管理式医疗与1981年至1994年之间0.054的赫芬达尔增加有关,从1981年的0.096上升到0.154。这相当于从10.4个同等规模的医院增加到6.5个同等规模的医院。在医生市场,我们估计,平均而言,管理式医疗导致1986年至1995年期间单独执业的医生减少了14个百分点。这意味着单独开业的医生比例从1986年的38%下降到1995年的24%。
Objective.To determine the extent to which managed care has led to consolidation among hospitals and physicians.Data Sources.We use data from the American Hospital Association, American Medical Association, and government censuses.Study Design.Two stage least squares regression analysis examines how cross‐section variation in managed care penetration affects provider consolidation, while controlling for the endogeneity of managed‐care penetration. Specifically, we examine inpatient hospital markets and physician practice size in large metropolitan areas.Data Collection Methods.All data are from secondary sources, merged at the level of the Primary Metropolitan Statistical Area.Principal Findings.We find that higher levels of local managed‐care penetration are associated with substantial increases in consolidation in hospital and physician markets. In the average market (managed‐care penetration equaled 34 percent in 1994), managed care was associated with an increase in the Herfindahl of .054 between 1981 and 1994, moving from .096 in 1981 to .154. This is equivalent to moving from 10.4 equal‐size hospitals to 6.5 equal‐sized hospitals. In the physician market place, we estimate that at the mean, managed care resulted in a 14 percentage point decrease of physicians in solo practice between 1986 and 1995. This implies a decrease in the percentage of doctors in solo practice from 38 percent in 1986 to 24 percent by 1995.
DOI: 10.1377/hlthaff.3.1.50
发表时间: 1984-01-01
期刊: Health affairs (Project Hope)
影响因子: --
作者:
Ermann, D;Gabel, J
通讯作者: Gabel, J
非 IPA HMO 对医院数量和医院容量的影响。
DOI: --
发表时间: 1995
期刊: Inquiry : a journal of medical care organization, provision and financing
影响因子: --
作者:
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通讯作者: Michael E. Chernew
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DOI: 10.1016/s0167-6296(97)00013-1
发表时间: 1998
影响因子: 3.5
作者:
D. Dranove
通讯作者: D. Dranove
DOI: 10.1016/s0167-6296(97)00045-3
发表时间: 1998-12-01
影响因子: 3.5
作者:
Dranove, D;Simon, CJ;White, WD
通讯作者: White, WD
DOI: 10.1016/0167-6296(92)90001-h
发表时间: 1992-10-01
影响因子: 3.5
作者:
MELNICK, GA;ZWANZIGER, J;PATTISON, R
通讯作者: PATTISON, R