Phibbs C S, Robinson J C
Center for Health Care Evaluation, Veterans Affairs Medical Center, Menlo Park, CA 94025.
Health Serv Res. 1993 Aug;28(3):313-24.
To provide a radius measure of the structure of local hospital markets that varies with hospital characteristics and is available for all hospitals in the United States.
1982 American Hospital Association (AHA) Survey of Hospitals, 1982 Area Resource File (ARF), and 1983 California Office of Statewide Health Planning and Development (OSHPD) discharge abstracts.
The OSHPD data were used to measure the radii necessary to capture 75 percent and 90 percent of each hospital's admissions. These radii were used as the dependent variables in regression models in which the independent variables were from the AHA and ARF. To estimate predicted market radii, the estimated parameters from the California models were applied to all nonfederal, short-term, general hospitals in the continental United States. These radii were used to define each hospital's service area, and all other hospitals within the calculated radii were considered potential competitors. Using this definition, we calculated two measures of local market structure: the number of other hospitals within the radius and a Herfindahl-Hirschman Index based on the distribution of hospital bed shares in the market.
These measures were calculated for all nonfederal, short-term, acute care hospitals in the continental United States for whom complete data were available (N = 4,884).
These measures are available from the authors on computer-readable diskette, matched to hospital identifiers.
提供一种衡量当地医院市场结构的半径指标，该指标随医院特征而变化，且适用于美国所有医院。
1982年美国医院协会（AHA）医院调查、1982年区域资源文件（ARF）以及1983年加利福尼亚州全州卫生规划与发展办公室（OSHPD）出院摘要。
利用OSHPD数据来衡量获取每家医院75%和90%住院量所需的半径。这些半径作为回归模型中的因变量，回归模型中的自变量来自AHA和ARF。为估计预测的市场半径，将加利福尼亚州模型的估计参数应用于美国大陆所有非联邦、短期、综合医院。这些半径用于定义每家医院的服务区域，计算出的半径范围内的所有其他医院被视为潜在竞争对手。利用这一定义，我们计算了当地市场结构的两个指标：半径范围内其他医院的数量以及基于市场中病床份额分布的赫芬达尔-赫希曼指数。
针对美国大陆所有有完整数据的非联邦、短期、急症护理医院（N = 4,884）计算这些指标。
作者可提供这些指标的计算机可读磁盘数据，并与医院标识符匹配。
