Scope and scale inefficiencies in physician practices
利用全国数据集，通过数据包络分析比较单专科与多专科医生团队，发现合并不同专科会导致范围无效率，且主要源于技术原因；大型团队能实现范围效率但存在规模无效率。
Using a national data set, this paper looks at the efficiency of physician practices, focusing on scopes of service by comparing single specialty groups and multispecialty groups. An analysis of efficiency using DEA indicates that there are scope inefficiencies from combining different types of providers into a single practice. Most of the inefficiency is due to technical rather than allocative reasons. In addition, we find that larger practices are able to capture efficiencies of scope, but incur inefficiencies of scale.