The Effects of Physician and Hospital Integration on Medicare Beneficiaries' Health Outcomes
研究了2005-2012年间医院收购医生诊所对65岁以上医疗保险患者死亡率、心脏病、糖尿病并发症等健康结果的影响，发现几乎没有影响。
Abstract We consider whether hospital acquisitions of physicians lead to improved clinical outcomes for medicare patients aged 65 and older. The analysis combines 2005–2012 Medicare fee-for-service and enrollment data with merger and physician affiliation information from the Levin Reports and SK&A, respectively. We determine the effect of acquisitions on several health outcomes: mortality, acute myocardial infarctions, acute circulatory conditions, ischemic heart disease, glaucoma, symptomatic diabetes complications, and asymptomatic diabetes complications. These outcomes represent the progression of hypertension and diabetes into worse health states. Our results indicate that hospital acquisitions of existing physician practices have little effect on the health outcomes we consider.