Table 6.

Estimated Coefficients for Quadratic Growth Model of Math and Reading Achievement Scores with Time-Varying Indicator of Mother’s Marital Duration

Fixed Effects	Math				Reading
	Coef.	Std. error	t ratio	p	Coef.	Std. error	t ratio	p
Intercept, πoij	6.28	0.22	29.21	<0.001	8.39	0.31	27.24	<0.001
Age, π1ij	23.28	0.23	100.02	<0.001	29.15	0.32	89.92	<0.001
Age2, π2ij	−1.12	0.03	−34.07	<0.001	−1.43	0.04	−32.33	<0.001
Years Married, π3ij	1.67	0.74	2.25	0.024	2.17	0.97	2.24	0.025
Years Married2, π4ij	−0.33	0.16	−2.01	0.044	−0.76	0.22	−3.40	0.001
Random Effects	Variance Comp.	df	χ2	p	Variance Comp.	df	χ2	p
Level 1
eti	35.96				66.02
Level 2
Intercept, πoij	33.34	2,310	3,463.51	<0.001	67.76	2,244	3,340.32	<0.001
Age, π1ij	56.04	2,310	4,155.08	<0.001	112.53	2,244	4,267.91	<0.001
Age2, π2ij	0.71	2,310	3,387.63	<0.001	1.38	2,244	3,502.56	<0.001