Hospital competition and financial performance: the effects of ambulatory surgery centers
研究了美国亚利桑那、加利福尼亚和得克萨斯三州日间手术中心（ASCs）的竞争对综合医院收入、成本和利润的影响，发现ASCs的存在对医院财务指标产生下行压力。
Ambulatory surgery centers (ASCs), limited-service alternatives for treating surgery patients not requiring an overnight stay, are a health-care service innovation that has proliferated in the U.S. and other countries in recent years. This paper examines the effects of ASC competition on revenues, costs, and profit margins of hospitals that also provided these services as a subset of their general services in Arizona, California, and Texas during the period 1997-2004. We identified all ASCs operating during the period in the 49 Dartmouth Hospital Referral Regions in the three states. The results of fixed effects models suggested that ASCs are meaningful competitors to general hospitals. We found downward pressure on revenues, costs, and profits in general hospitals associated with ASC presence.