Nauenberg E, Andrijuk Y, Eisinger M
Department of Economics, State University of New York at Buffalo, Buffalo, NY, USA.
Health Econ. 2001 Apr;10(3):271-6. doi: 10.1002/hec.595.
Economists have long used state-collected discharge data to construct Hirschman-Herfindahl (HH) indices measuring hospital competition. Since data are collected to determine the facility providing the service rather than ownership, the difference between the number of reporting facilities and the number of competitors has grown over time due to mergers and networking activities. Consequently, the validity of the discharge HH methodology, as currently employed, is in doubt. Comparing the annual census of New York state acute-care hospitals by the State and the American Hospital Association (AHA), we find that it is increasingly important to account for changes in ownership when constructing such indices.
长期以来，经济学家一直使用国家收集的出院数据来构建衡量医院竞争的赫希曼-赫芬达尔（HH）指数。由于收集数据的目的是确定提供服务的机构而非所有权，随着时间的推移，由于合并和联网活动，报告机构的数量与竞争对手数量之间的差异有所增加。因此，目前采用的出院HH方法的有效性受到质疑。通过比较纽约州和美国医院协会（AHA）对纽约州急性护理医院的年度普查，我们发现，在构建此类指数时考虑所有权变化变得越来越重要。
