Table 3.

Mean difference test

Panel A: between respondents having primary school pupil and others
	Primary school = 1 (1)	Primary school = 0 (2)	Difference (1) − (2)
Male sample
Schooling years	14.7	14.4	0.24**
Income	7.00	5.38	1.61***
Ages	38.4	33.8	4.60***
Female sample
Schooling years	14.1	14.2	−0.01
Income	6.17	5.38	0.79***
Ages	35.9	33.6	2.33***

Panel B: between respondents having junior high school student and others
	Junior high school = 1 (1)	Junior high school = 0 (2)	Difference (1) − (2)
Male sample
Schooling years	14.3	14.6	−0.30**
Income	7.05	5.56	1.49***
Ages	38.7	34.7	4.40***
Female sample
Schooling years	13.5	14.3	−0.79***
Income	6.18	5.46	0.71***
Ages	38.4	33.4	4.96***

Sample is limited to workers under 50 years old

**, and *** denote statistical significance at the 5%, and 1% levels, respectively