Appendix Table A-2.
Mean |
Bias |
T-Test |
|||||
---|---|---|---|---|---|---|---|
Sample | Treated | Control | % | % Reduction | T | P>T | |
Height-for-Age Z | Unmatched | −1.33 | −1.34 | 1.20 | 0.15 | 0.88 | |
Matched | −1.36 | −1.50 | 11.50 | −899.40 | 0.82 | 0.41 | |
Weight-for-Age Z | Unmatched | −1.38 | −1.19 | −16.90 | −2.25 | 0.03 | |
Matched | −1.49 | −1.50 | 1.00 | 93.80 | 0.08 | 0.94 | |
Wealth Quintile=2 | Unmatched | 0.30 | 0.20 | 22.60 | 3.41 | 0.00 | |
Matched | 0.27 | 0.30 | −8.00 | 64.50 | −0.55 | 0.58 | |
Wealth Quintile=3 | Unmatched | 0.16 | 0.20 | −11.60 | −1.59 | 0.11 | |
Matched | 0.16 | 0.17 | −0.70 | 94.30 | −0.05 | 0.96 | |
Wealth Quintile=4 | Unmatched | 0.09 | 0.21 | −34.00 | −4.26 | 0.00 | |
Matched | 0.09 | 0.08 | 0.70 | 98.00 | 0.06 | 0.95 | |
Wealth Quintile=5 | Unmatched | 0.07 | 0.21 | −39.50 | −4.83 | 0.00 | |
Matched | 0.09 | 0.07 | 4.70 | 88.20 | 0.42 | 0.67 | |
Mother's Education (Years) | Unmatched | 3.37 | 4.35 | −27.70 | −4.09 | 0.00 | |
Matched | 3.57 | 3.52 | 1.30 | 95.20 | 0.10 | 0.92 | |
Father's Education (Years) Indicator, Father Passed Away | Unmatched | 6.12 | 7.05 | −25.60 | −3.73 | 0.00 | |
Matched | 5.91 | 5.91 | 0.20 | 99.10 | 0.02 | 0.99 | |
Unmatched | 0.01 | 0.02 | −6.90 | −0.87 | 0.38 | ||
Matched | 0.02 | 0.02 | −0.90 | 87.00 | −0.05 | 0.96 | |
Prior Cognitive Test (2000) | Unmatched | 13.70 | 17.90 | −41.70 | −4.72 | 0.00 | |
Matched | 13.47 | 13.80 | −3.30 | 92.00 | −0.25 | 0.80 | |
Prior Math Achievement | Unmatched | 68.86 | 71.60 | −17.60 | −1.93 | 0.05 | |
Matched | 68.49 | 68.70 | −1.40 | 92.20 | −0.09 | 0.93 | |
Prior Language Achievement | Unmatched | 68.46 | 73.34 | −29.50 | −3.27 | 0.00 | |
Matched | 68.37 | 68.75 | −2.30 | 92.20 | −0.15 | 0.88 | |
Grade Attained | Unmatched | 5.77 | 6.44 | −29.90 | −4.33 | 0.00 | |
Matched | 6.68 | 6.78 | −4.40 | 85.40 | −0.38 | 0.70 | |
Age | Unmatched | 13.59 | 13.79 | −11.30 | −1.46 | 0.14 | |
Matched | 14.39 | 14.43 | −1.90 | 82.80 | −0.23 | 0.82 | |
Female | Unmatched | 0.46 | 0.45 | 2.30 | 0.32 | 0.75 | |
Matched | 0.50 | 0.51 | −1.90 | 14.50 | −0.14 | 0.89 |
Source: Gansu Survey of Children and Families. Note: Indicator for mother passed away dropped due to collinearity.