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. Author manuscript; available in PMC: 2018 Jan 1.
Published in final edited form as: J Labor Econ. 2017;35(1):18977. doi: 10.3386/w18977

Table 3.

First-Stage Regressions of Doctor-Level Measures on Market Skill Measures

Doctor Decision Making
Doctor Surgical Skill
All Low High All Low High
Market decision making .353  
(.002)		 .356  
(.002)		 .347  
(.002)		 −.026  
(.002)		 −.024  
(.002)		 −.028  
(.002)
Market surgical −.014  
(.001)		 −.009  
(.002)		 −.019  
(.002)		 .284  
(.002)		 .290  
(.003)		 .276  
(.003)
R2 .165 .179 .152 .098 .105 .090

Note.—Standard errors (in parentheses) are clustered at the 3-digit zip code level. Regressions also include market price, estimated C-section risk, indicators for African American, Hispanics, race missing, education (less than high school, high school, some college, missing), married, married missing, Medicaid, Medicaid missing, teen mom, 25–34, 35 plus, smoking, smoking missing, male child, parity 2, parity 3, parity 4 plus, parity missing, month and year of birth indicators, indicators for 3-digit zip code, and an indicator for whether the birth was on a week day.