(1)

(2)

(3)

(4)

(5)

Log (income)

0.369***

0.343***

0.342***

0.324***

0.309***

(0.010)

(0.014)

(0.012)

(0.013)

(0.013)

Years of Education

0.066***

0.065***

0.067***

0.062***

(0.004)

(0.004)

(0.004)

(0.004)

Log income * years of Education

−0.010***

−0.012***

−0.011***

(0.004)

(0.003)

(0.003)

Party member

0.101***

0.115***

0.109***

(0.029)

(0.030)

(0.030)

Male

0.372***

0.376***

0.373***

(0.020)

(0.020)

(0.020)

Healthy

0.224***

0.231***

0.233***

(0.083)

(0.084)

(0.083)

Leader/Professional and Technical

0.297***

0.293***

(0.040)

(0.040)

Office worker/Business and Service

0.175***

0.180***

(0.036)

(0.036)

Ordinary worker

0.204***

0.209***

(0.037)

(0.037)

_cons

6.697***

6.847***

6.291***

6.301***

6.152***

(1.157)

(1.118)

(1.075)

(1.081)

(1.074)

N

4456

4437

4437

4437

4437

R2

0.142

0.200

0.268

0.260

0.270