Table 2.

Test statistics on the validity of the instrumental variable

	Absence length		Systematic term		Non-systematic term
	Coef.	p-value	Coef.	p-value	Coef.	p-value
A. Correlation with mid-life health
General health status at 32–33	−.10	.00	−0.10	.00	−.01	0.38
No. Chronics suffered at 32–33	.11	.00	0.16	.00	.01	0.40
No. Chronics ever suffered	.13	.00	0.18	.00	.01	0.23
B. Correlation with residuals of trust
Trust residuals unrelated to exams	−.03	.01	−.04	.00	−.01	0.66

Indicator of general health status has 4 categories: 0-poor, 1-fair, 2-good, 3-excellent