Table 2.

Descriptive statistics of variables.

Variable	Observation	Mean	Standard deviation	Median	Minimum	Maximum
health	20101	3.09	1.20	3	1	5
dig	20101	0.24	0.14	0.17	0.12	0.91
age	20101	45.71	16.68	47	16	95
age_2	20101	2367.31	1570.81	2209	256	9025
gender	20101	0.50	0.50	1	0	1
eduyear	20101	8.87	4.70	9	0	24
marriage	20101	0.83	0.37	1	0	1
smoke	20101	0.27	0.44	0	0	1
drink	20101	0.13	0.33	0	0	1
familysize	20101	4.09	1.85	4	1	10
lnfincomeper	20101	9.86	0.93	9.88	7.31	12.21
lngdp	20101	10.36	0.75	10.49	9.10	11.62
lnmediexp	20101	6.52	0.50	6.57	5.70	7.48