Table 1.

Summary statistics: Mean of the outcome variables by the length of preceding and subsequent birth intervals in months

	GPA		Cognitive Ability		Educational Attainment
Interval	Preceding	Subsequent	Preceding	Subsequent	Preceding	Subsequent
6–12	183.2	189.5	4.7	4.8	11.7	11.8
13–18	204.7	209.0	5.0	5.3	12.2	12.4
19–24	210.4	213.8	5.2	5.4	12.5	12.6
25–30	210.7	215.1	5.2	5.4	12.5	12.7
31–36	208.5	211.4	5.1	5.4	12.6	12.7
37–42	207.0	210.9	5.1	5.3	12.5	12.7
43–48	207.5	210.3	5.0	5.3	12.5	12.7
49–54	207.0	210.4	4.9	5.3	12.5	12.6
55–60	206.6	208.5	4.9	5.2	12.5	12.6
61–66	205.3	208.2	4.9	5.2	12.5	12.6
67–72	204.8	207.1	4.9	5.2	12.4	12.5
73–78	205.9	207.4	4.8	5.1	12.5	12.5
79–84	205.1	206.3	4.9	5.0	12.5	12.5
85–90	207.3	205.6	4.9	5.2	12.5	12.5
91–96	203.9	203.8	4.9	5.0	12.6	12.5
>96	200.8	202.2	4.9	5.0	12.6	12.4
All	207.9	211.0	5.1	5.3	12.5	12.6
	Income (not logged)		Social Welfare (%)		Unemployment (%)
Interval	Preceding	Subsequent	Preceding	Subsequent	Preceding	Subsequent
6–12	1,446.8	1,420.7	11.9	11.8	28.3	27.5
13–18	1,519.0	1,547.9	9.1	8.9	26.1	24.5
19–24	1,605.9	1,634.8	7.4	7.2	24.5	23.0
25–30	1,634.0	1,672.0	6.8	6.5	24.1	22.6
31–36	1,650.8	1,697.7	6.3	6.0	23.7	22.0
37–42	1,648.3	1,670.7	6.1	6.1	24.0	22.7
43–48	1,630.4	1,692.9	6.2	6.2	24.1	22.9
49–54	1,622.4	1,664.3	6.5	6.3	24.3	22.8
55–60	1,619.8	1,672.9	6.4	6.4	24.7	23.6
61–66	1,612.8	1,679.4	6.3	6.1	24.5	23.1
67–72	1,602.1	1,663.2	6.3	6.4	24.6	23.0
73–78	1,622.3	1,672.7	6.1	6.5	23.6	23.5
79–84	1,584.8	1,664.6	5.9	6.1	25.0	23.8
85–90	1,605.6	1,660.8	6.4	6.7	23.7	24.8
91–96	1,586.5	1,667.3	6.5	6.7	25.3	23.8
>96	1,556.3	1,643.1	6.9	6.8	25.0	24.9
All	1,610.3	1,657.1	6.8	6.7	24.5	23.2