Comparing Measures of Physician Market Concentration Using Tax Identification Numbers Versus Independent Negotiating Units

Scott Ode; Bryan Dowd; Roger Feldman

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Comparing Measures of Physician Market Concentration Using Tax Identification Numbers Versus Independent Negotiating Units

机译：使用税号与独立谈判单位比较医师市场集中度的措施

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Analysts interested in physician market concentration often have access to tax identification numbers (TINs), but not the number of truly independent negotiating units (NUs). Health plans do know the true number of NUs, and, using 2014 claims data for Minnesota physicians from a large midwestern health plan, we compare Herfindahl-Hirschman Index (HHI) measures of physician market concentration using TINs versus NUs at the county and metropolitan statistical area (MSA) levels for thirteen specialties. We found that HHIs computed using TINs versus NUs were similar across Minnesota. Two MSAs in Minnesota met the Department of Justice’s definition of highly concentrated markets. There is reason to believe that the discrepancy between TIN and NU HHIs may vary by insurance product and region of the country, and so we encourage other researchers to work with health plans to replicate our study.

机译：对医师市场集中度感兴趣的分析师通常可以使用税号（TIN），但不能使用真正独立的谈判单位（NU）的数目。卫生计划确实知道NU的真实数量，并且使用来自大型中西部卫生计划的明尼苏达州医师的2014年索赔数据，我们比较了县和大城市统计数据中使用TIN与NU的Herfindahl-Hirschman Index（HHI）医师市场集中度测度地区（MSA）级别的13个专业。我们发现，在明尼苏达州，使用TIN与NU计算的HHI相似。明尼苏达州的两家MSA达到了司法部对高度集中市场的定义。有理由相信TIN和NU HHI之间的差异可能会因保险产品和国家/地区的不同而有所差异，因此我们鼓励其他研究人员采用健康计划来重复我们的研究。

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来源
《The Antitrust Bulletin》 |2019年第1期|128-135|共8页
作者
Scott Ode; Bryan Dowd; Roger Feldman;
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作者单位

*Mathematica Policy Research, Minnetonka, MN, USA;

**Division of Health Policy and Management, University of Minnesota, Minneapolis, MN, USA;

**Division of Health Policy and Management, University of Minnesota, Minneapolis, MN, USA;

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原文格式 PDF
正文语种 eng
中图分类
关键词
physician; consolidation; markets;

机译：医师;合并;市场;

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Comparing Measures of Physician Market Concentration Using Tax Identification Numbers Versus Independent Negotiating Units

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