The impact of high intensity care around birth on long-term neurodevelopmental outcomes

Health Economics Review

Table 4 Instrumental Variables Results (Level III&II vs Level I)

LEVELS	2-Step GMM	Endogenous bivariate probit
III&II vs I	0.006 [0.128]	0.01 [0.03]
Observations	825	825
Overid	0.281
Overid P-val	0.87
F-test	47.9
Endog	0.02
Endog P-val	0.87
Rho		−0.08 [0.258]
Chi-sq		0.001
F-analog		65,341
Exon P-val		0.914

*** p < 0.01, ** p < 0.05
^aTable presents reduced form estimates of the effects of interest from two stage least squares, generalized method of moments, endogenous bivariate probit. Robust standard errors in brackets. *** p < 0.01, ** p < 0.05. Over is the Hansen J test for overidentification; Endog is a test for endogeneity of exposure variable; F-test is Angrist-Pischke multivariate F-test of excluded instruments; Chi-sq is Wald test of Rho = 0. F-analog is the test of joint significance of instrumental variables. Exon P-val is the smallest p-value of the excluded instrument in the regression of residuals on covariates and instrumental variables. 2SLS estimates are numerically equivalent 2-Step GMM up to two decimal places

ISSN: 2191-1991