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. Author manuscript; available in PMC: 2016 Nov 1.
Published in final edited form as: Econ J (London). 2015 Nov 17;125(588):F347–F371. doi: 10.1111/ecoj.12291

Table 3.

Child Early Health Shocks and Parental Investment in Health

Dependent variable:
Health investment
in child i (log)
Health investment
in child j (log)
Difference in
Health investment

(1) (2) (3)
Early health shocks (i) 1.192***
[0.325]
−0.288
[0.312]
1.349***
[0.243]
Early health shocks (j) 0.001
[0.322]
1.194***
[0.309]
Birth weight: < 2 kg (i) 0.113
[0.286]
−0.297
[0.275]
0.534***
[0.204]
Birth weight: 2 – 2.5 kg (i) 0.237
[0.232]
0.286
[0.223]
0.484***
[0.163]
Birth weight: 2.5 – 3 kg (i) 0.248
[0.213]
−0.192
[0.204]
0.418***
[0.139]
Birth weight: < 2 kg (j) 0.203
[0.289]
0.889***
[0.277]
Birth weight: 2 – 2.5 kg (j) 0.054
[0.227]
0.463**
[0.218]
Birth weight: 2.5 – 3 kg (j) −0.073
[0.200]
0.317*
[0.192]
Male (i) 0.291**
[0.137]
0.226*
[0.132]
0.071
[0.095]
Male (j) 0.021
[0.137]
0.087
[0.132]
Age −0.041*
[0.024]
−0.046**
[0.023]
Born at the first parity 0.387**
[0.162]
0.361**
[0.155]
Maternal age 0.007
[0.015]
0.003
[0.015]
Maternal ethnicity (Han=1) 0.006
[0.173]
0.102
[0.166]
Maternal schooling years 0.083***
[0.024]
0.114***
[0.023]
Maternal working sector (public=1) −0.286
[0.246]
−0.378
[0.237]
Rural −0.298**
[0.145]
0.047
[0.139]
Household asset 0.124***
[0.045]
0.067
[0.043]
χ2 18.87 0.14
p-values 0.34 0.71
# Pair of twins 1,456 1,456 1,456

Note: Columns (1) and (2) report the OLS estimates; column (3) reports the within-twin fixed-effect estimates. Standard errors are in brackets;

*

significant at 10%;

**

significant at 5%;

***

significant at 1%.