Table 7.

Estimated parameters of the parental investment equations

	Age of Child, 3 Years		Age of Child, 5 Years
	${\mathrm{\lambda }}_1^{\left(1\right)}$	${\mathrm{\lambda }}_1^{\left(2\right)}$	${\mathrm{\lambda }}_2^{\left(1\right)}$	${\mathrm{\lambda }}_2^{\left(2\right)}$
Mother NVQ of 4 or Higher	0.342**	0.014	0.364**	0.152*
	(0.091)	(0.089)	(0.107)	(0.073)
Number of Siblings	–0.060	–0.036	–0.055	–0.074**
	(0.046)	(0.044)	(0.043)	(0.027)
Single-Parent Household	–0.077	0.001	–0.341**	–0.119*
	(0.084)	(0.068)	(0.082)	(0.054)

Notes: All reported coefficients are standardized. For the continuous covariates, the coefficient represents the change in the dependent variable associated with a 1 standard deviation change in the covariate. For the binary covariates, the coefficient represents the change associated with a shift in the variable from 0 to 1. Standard errors are shown in parentheses.

*p < .05; **p < .01