. Author manuscript; available in PMC: 2015 Mar 1.

Published in final edited form as: Int J Health Care Finance Econ. 2014 Mar;14(1):1–18. doi: 10.1007/s10754-013-9136-3

Table 3.

First-stage results, regression of nonprofit ownership on differential distance

	Full sample	Those who travelled more than 100 km from origin zip code
Differential distance (NFP–FP)	−.0050691 (−33.17)	−.0002435 (−1.18)
R²	0.2171	0.2264
Observations	278,848	4,999

Regression includes all the covariates reported in Table 1 and state fixed effects

Robust t statistics clustered at the zip code level are reported in parentheses