1

2

3

Family

−0.9979^***

−0.8100

−2.1128^***

t = −25.5578

t = −1.60

t = −5.5049

Lnedu

0.2854

0.1627

t = 0.3727

t = 0.3944

Lnincome

−0.6421^***

t = −4.8106

R²

0.9849

0.9851

0.9962