Cost efficiency of US hospitals: a stochastic frontier approach
研究了1990-1996年间1631家美国医院中管理式医疗等因素对效率的影响，发现平均效率提升约28%，且与HMO渗透率、行业集中度负相关，与医保份额、营利性质正相关。
This study examined the impact of managed care and other environmental factors on hospital inefficiency in 1631 US hospitals during the period 1990-1996. A panel, stochastic frontier regression model was used to estimate inefficiency parameters and inefficiency scores. The results suggest that mean estimated inefficiency decreased by about 28% during the study period. Inefficiency was negatively associated with health maintenance organization (HMO) penetration and industry concentration. It was positively related with Medicare share and for-profit ownership status.