| variables | interpretation | Obs | Mean | Standard deviation | Min | Max |
| Wage | Total wage income in 2014 | 3208 | 10.124 | 0.915 | 4.787 | 12.92 |
| Work | never = 1, once several months = 2, once a month = 3, twice or three times a month = 4, once or twice a week = 5, three to four times a week = 6, almost every day = 7, Work = 1 if frequencies ≥ 6, otherwise Work = 0 | 3208 | 0.437 | 0.496 | 0 | 1 |
| Urban | Dummy variable (urban = 1, rural = 0) | 3208 | 0.694 | 0.461 | 0 | 1 |
| Male | Dummy variable (male = 1, female = 0) | 3208 | 0.568 | 0.495 | 0 | 1 |
| Age | range from 16 to 65 | 3208 | 32.367 | 9.564 | 16 | 62 |
| Agesq/100 | Square of age divided by 100 | 3208 | 11.390 | 6.862 | 2.56 | 38.44 |
| Married | Dummy variable (being married = 1，else = 0) | 3208 | 0.718 | 0.450 | 0 | 1 |
| Illiterate/semi-literate | Illiterate/semi-literate | 3208 | 0.015 | 0.123 | 0 | 1 |
| Primary school | Primary school | 3208 | 0.111 | 0.315 | 0 | 1 |
| Junior high school | Junior high school | 3208 | 0.290 | 0.454 | 0 | 1 |
| High school/secondary school/technical school/vocational high school | High school/secondary school/technical school/vocational high school | 3208 | 0.276 | 0.447 | 0 | 1 |
| College | College | 3208 | 0.177 | 0.382 | 0 | 1 |
| Undergraduate | Undergraduate | 3208 | 0.130 | 0.337 | 0 | 1 |
| Health | Dummy variable（healthy = 1, else = 0) | 3208 | 0.869 | 0.337 | 0 | 1 |
| Otherwork | Numbers of other work except for the main job | 3208 | 0.137 | 0.443 | 0 | 4 |
| Promotion | Whether got promoted in the job, dummy variable (promoted = 1, else = 0) | 3208 | 0.119 | 0.324 | 0 | 1 |
| Computer | Whether a computer needs to be used in the work, dummy variable (yes = 1, else = 0) | 3208 | 0.589 | 0.492 | 0 | 1 |
| Scale | Number of employees | 3208 | 4.250 | 1.901 | 0 | 1 |
| Cash | Whether there is Cash benefits in the job, dummy variable (yes = 1，else = 0) | 3208 | 0.407 | 0.491 | 0 | 1 |
| Welfare | Whether there is Welfare benefits in the job, dummy variable (yes = 1，else = 0) | 3208 | 0.446 | 0.497 | 0 | 1 |
| Intelligence | The level of intelligence | 3208 | 0.928 | 0.259 | 0 | 1 |
| Contra | Signing a contract or not, dummy variable (contra = 1 if signing a contract, contra = 0 else) | 3208 | 0.569 | 0.495 | 0 | 1 |
| East | East region | 3208 | 0.426 | 0.495 | 0 | 1 |
| Centre | Central region | 3208 | 0.247 | 0.431 | 0 | 1 |
| West | West region | 3208 | 0.177 | 0.382 | 0 | 1 |
| Northeast | Northeast region | 3208 | 0.150 | 0.357 | 0 | 1 |
| Lpgdp | GDP per person in the local | 3208 | 10.828 | 0.415 | 10.181 | 11.549 |
| Employer | Dummy variables of employer | 3208 | 3.504 | 1.184 | 1 | 8 |
| Occupation | Dummy variables of occupation | 3208 | 8.384 | 5.561 | 1 | 19 |