Table 5.

Robustness checks

Variable	Coef	Std. err	z	p >|z|	[95% Conf Interval]
Birth year	0.14	0.34	6.31	0.000***	0.12, 0.87
Birth year squared	0.10	0.32	4.11	0.031**	0.121, 0.678
_cons	0.12	0.11	0.21	0. 251	− 0.13, 0.51
N = 52,024
Prob > F = < 0.0001***
R-squared = 0.163

^***p < 0.001, **p < 0.05, *p < 0.1