Dowd B, Feldman R, Moscovice I, Wisner C, Bland P, Finch M
Institute for Health Services Research, School of Public Health, University of Minnesota, Minneapolis 55455, USA.
Health Care Financ Rev. 1996 Spring;17(3):35-57.
Using econometric models of endogenous sample selection, we examine possible payment bias to Medicare Tax Equity and Fiscal Responsibility Act of 1982 (TEFRA) risk health maintenance organizations (HMOs) in the Twin Cities in 1988. We do not find statistically significant evidence of favorable HMO selection. In fact, the sign of the selection term indicates adverse selection into HMOs. This finding is interesting, in view of the fact that three of the five risk HMOs in the study have since converted to non-risk contracts.
利用内生样本选择的计量经济学模型,我们研究了1988年明尼阿波利斯市医疗保险税公平与财政责任法案(TEFRA)风险健康维护组织(HMO)可能存在的支付偏差。我们没有发现有利于HMO选择的统计学显著证据。事实上,选择项的符号表明存在对HMO的逆向选择。鉴于该研究中五个风险HMO中有三个后来已转换为非风险合同,这一发现很有意思。