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. Author manuscript; available in PMC: 2016 May 1.
Published in final edited form as: J Health Econ. 2015 Feb 21;41:107–116. doi: 10.1016/j.jhealeco.2015.01.005

Table D2.

Effect of Interaction on Productivity: Using the Multiplicative Interaction of Plastic Alleles

Dependent Variable: ln Wage Rate in 1992
(1) (2) (3)
Panel A: Main Effects
Neuroplasticity Genes −0.0141 (0.0164) −0.0147 (0.0164) −0.0187 (0.0311)
Standardized Birth Weight 0.0501 (0.0473) 0.0526 (0.0476) 0.1008 (0.0786)
Controls
 Demographic and Family SES Y Y Y
 Sibling Fixed Effects N N Y
Estimation
 Weighting by Prob. of Being in Sib Sample N Y N
N 820 820 820
R Sqr. 0.0919 0.0942 0.6009
Panel B: Gene-Environment Interaction
Neuroplasticity Genes −0.0130 (0.0165) −0.0136 (0.0164) −0.0104 (0.0311)
Standardized Birth Weight 0.1224** (0.0526) 0.1212** (0.0525) 0.3155*** (0.1036)
G × E −0.0241* (0.0129) −0.0231* (0.0127) −0.0664*** (0.0209)
Controls
 Demographic and Family SES Y Y Y
 Sibling Fixed Effects N N Y
Estimation
 Weighting by Prob. of Being in Sib Sample N Y N
N 820 820 820
R Sqr. 0.0936 0.0957 0.6069

Notes: This table recreates the estimates of Table 6 using alternate measure for neuroplasticity genes. Our base measure is the additive risk score between BDNF, COMT, and APOE, while the estimates in Table D2 use the multiplicative interaction between BDNF, COMT, and APOE.