table 7

Average Characteristics by Child’s Quarter-of-birth, Mothers of Five-year-olds Without Additional Young Children

	Single Mothers
	Q294	Q394	Q494	Q195	F−Statistic	P−value
Age	32.606	32.446	32.063	31.604	44.63	0.00
Central city	0.134	0.135	0.131	0.132	0.32	0.80
White	0.620	0.614	0.610	0.609	0.88	0.45
Own children aged 6 to 12	0.618	0.619	0.627	0.637	1.89	0.13
Own children aged 13 to 17	0.272	0.275	0.256	0.241	6.30	0.00
Own children aged 18 +	0.048	0.052	0.048	0.045	1.46	0.22
Household members aged 0 to 17	0.069	0.068	0.070	0.071	0.89	0.44
Household members aged 18 +	0.289	0.290	0.299	0.305	2.69	0.04
HSD	0.319	0.316	0.321	0.312	0.41	0.75
Some college	0.381	0.383	0.385	0.387	0.49	0.69
BA degree	0.093	0.092	0.088	0.088	0.96	0.41
Grad degree	0.034	0.032	0.028	0.029	0.81	0.49
N	12,916	13,850	12,382	12,247
	Married Mothers
	Q294	Q394	Q494	Q195	F−Statistic	P−value
Age	35.582	35.264	35.065	34.753	145.6	0.00
Central city	0.095	0.099	0.096	0.099	2.32	0.00
White	0.823	0.815	0.805	0.812	8.85	0.00
Own children aged 6 to 12	0.792	0.796	0.802	0.817	10.09	0.00
Own children aged 13 to 17	0.282	0.286	0.270	0.240	55.69	0.00
Own children aged 18 +	0.044	0.042	0.044	0.038	3.34	0.02
Household members aged 0 to 17	0.127	0.129	0.132	0.129	0.48	0.40
Household Members aged 18 +	1.087	1.085	1.099	1.092	7.03	0.00
HSD	0.267	0.273	0.265	0.266	2.83	0.04
Some college	0.359	0.341	0.345	0.340	1.45	0.22
BA degree	0.197	0.189	0.186	0.183	6.60	0.00
Grad degree	0.079	0.073	0.074	0.077	5.37	0.00
N	38,209	39,937	36,692	36,460

Notes: Based on the author’s calculations using the 1980 Census PUMS and the 2000 Restricted Access Long Form Data. The presented statistics are mean values in the sample of mothers of five-year-olds (see text for sample construction). The education variables represent percents of the population with each amount of education, where the omitted category is those who did not finish high school.