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Revisiting the relationship between managed care and hospital consolidation.

Abstract：

OBJECTIVE:This paper analyzes whether the rise in managed care during the 1990s caused the increase in hospital concentration. DATA SOURCES:We assemble data from the American Hospital Association, InterStudy and government censuses from 1990 to 2000. STUDY DESIGN:We employ linear regression analyses on long differenced data to estimate the impact of managed care penetration on hospital consolidation. Instrumental variable analogs of these regressions are also analyzed to control for potential endogeneity. DATA COLLECTION:All data are from secondary sources merged at the level of the Health Care Services Area. PRINCIPLE FINDINGS:In 1990, the mean population-weighted hospital Herfindahl-Hirschman index (HHI) in a Health Services Area was .19. By 2000, the HHI had risen to .26. Most of this increase in hospital concentration is due to hospital consolidation. Over the same time frame HMO penetration increased three fold. However, our regression analysis strongly implies that the rise of managed care did not cause the hospital consolidation wave. This finding is robust to a number of different specifications.

journal_name

Health Serv Res

journal_title

Health services research

authors

Town RJ,Wholey D,Feldman R,Burns LR

doi

10.1111/j.1475-6773.2006.00601.x

subject

Has Abstract

pub_date

2007-02-01 00:00:00

pages

219-38

issue

1 Pt 1

eissn

0017-9124

issn

1475-6773

pii

HESR601

journal_volume

42

pub_type

杂志文章

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