| 变量 | (1) | (2) | (3) | (4) | 
| 0 VS 1,2,3,4 | 0,1 VS 2,3,4 | 0,1,2 VS 3,4 | 0,1,2,3 VS 4 | |
| 性别 | 0.291*** | 0.430*** | 0.741*** | 0.669*** | 
| 
 | (2.68) | (3.71) | (4.77) | (3.14) | 
| 年龄 | 0.636*** | 0.486*** | 0.602*** | 0.314* | 
| 
 | (4.73) | (3.77) | (4.07) | (1.68) | 
| 教育年限 | 0.078*** | 0.056** | 0.086*** | 0.045 | 
| 
 | (3.50) | (2.57) | (3.15) | (1.39) | 
| 婚姻状况 | 0.832*** | 0.922*** | 1.035*** | 1.148*** | 
| 
 | (5.67) | (5.73) | (4.99) | (4.10) | 
| 政治面貌 | 0.748*** | 0.963*** | 1.179*** | 1.373*** | 
| 
 | (4.08) | (5.59) | (6.19) | (5.85) |