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Table 8 IV regression model results- by Birthweight

From: Midday meals as an early childhood nutrition intervention: evidence from plantation communities in Sri Lanka

 

IV– Random Effects Regression

 

Low BW

Normal/High BW

 

WAZ

HAZ

WHZ

WAZ

HAZ

WHZ

Treatment var

Trt

0.009 (0.075)

0.024+ (0.014)

0.014 (0.021)

0.036** (0.007)

0.078** (0.023)

−0.021 (0.036)

 Other controls?

Yes

Yes

Yes

Yes

Yes

Yes

 Observations

7336

4847

3748

9878

5462

4035

σu

0

0.102

0

0

0.114

0

σe

15.420

0.227

1.457

0.430

0.246

0.873

ρ

0

0.168

0

0

0.176

0

Kleibergen-Paap LM Stat

0.14

64.62**

27.54**

25.88**

56.42**

33.97**

Cragg-Donald Wald F Stat

0.44

687.65

184.18

106.09

548.89

159.33

Sargan-Hansen Test

0.668

0.080

0.406

4.136*

0.059

2.018

  1. Robust standard errors in parenthesis, **p < 0.01, *p < 0.05, + p < 0.1
  2. K-P LM test [Null: matrix of reduced form coefficients has rank = K1–1 (underidentification)], C-D Wald F Test [Null: Equation is weakly identified], S-H Test [Null: Overidentification restriction is satisfied]. Other controls include child age, age squared, gender, zscore of first weight, zscore of birthweight, zscore of first height, pcare, ethnicity, CDC status and birth-year fixed effects either as direct controls or instruments