2004

2006

urban

rural

urban

rural

(1)

(2)

(3)

(4)

Primary education

0.04467***

0.0376***

0.0368***

0.0191**

High school education

0.0779***

0.0137

0.0576***

0.0457***

Vocational and technical education

0.1267***

0.0438**

0.1046***

0.0839***

Higher education

0.0641***

0.0796***

0.1101***

0.1137***

Length of service

0.0200***

0.0136**

0.0140***

0.0258***

Square of length of service

−0.0003***

−0.0003***

−0.0001**

−0.0005***

male

0.0671

0.1422***

0.1862***

0.1875***

married

0.0378

0.0658

0.0501

-0.0152

Good health

0.0020

0.2311***

0.1968***

0.1916**

Health status in genera

−0.0526

0.1462

0.1631**

0.1449

Height Z value

0.0981***

0.0594***

0.0503**

0.0490***

Career

YES

YES

YES

YES

Ownership

YES

YES

YES

YES

province

YES

YES

YES

YES

Constant term

6.0385***

5.961***

5.8424***

5.9921***

R²

0.308

0.220

0.352

0.230

N

1402

1213

1229

1518