| var | (1) | (2) | (3) | (4) | (5) | (6) | 
| zs | zs | blr | blr | dir | dir | |
| dis | 0.713*** | 0.078* | 0.003*** | 0.004*** | 0.0368*** | 0.031*** | 
| 
 | (5.12) | (1.94) | (11.73) | (7.98) | (4.67) | (3.36) | 
| bas | 
 | 0.426*** | 
 | −0.002 | 
 | −0.241 | 
| 
 | (3.25) | 
 | (−0.27) | 
 | (−0.84) | |
| bac | 
 | −0.006*** | 
 | 0.00004 | 
 | 0.002 | 
| 
 | (−3.46) | 
 | (0.16) | 
 | (0.67) | |
| nop | 
 | 0.1216** | 
 | −0.006** | 
 | −0.002 | 
| 
 | (−2.95) | 
 | (−1.84) | 
 | (−0.06) | |
| dar | 
 | −9.88** | 
 | −0.235** | 
 | −7.89** | 
| 
 | (−39.81) | 
 | (−6.01) | 
 | (−11.87) | |
| ca | 
 | 0.251 | 
 | −0.106*** | 
 | −1.41*** | 
| 
 | (1.57) | 
 | (−5.97) | 
 | (−4.07) | |
| nr | 
 | −0.060** | 
 | 0.003* | 
 | 0.287** | 
| 
 | (2.04) | 
 | (1.9) | 
 | (3.37) | |
| pd | 
 | 0.044 | 
 | −0.019*** | 
 | −2.08*** | 
| 
 | (1.57) | 
 | (−4.06) | 
 | (−10.43) | |
| id | 
 | 0.152 | 
 | 0.007 | 
 | −0.288 | 
| 
 | (0.36) | 
 | (1.56) | 
 | (−2.71) | |
| oc | 
 | 0.05 | 
 | −0.031 | 
 | −0.081 | 
| 
 | (0.78) | 
 | (−1.36) | 
 | (−0.34) | |
| gpc | −6.01*** | 4.51*** | −0.055 | 0.063 | −7.03*** | 3.01 | 
| (−3.85) | (3.41) | (−0.68) | (0.74) | (−3.51) | (1.85) | |
| roi | 4.2*** | 0.361 | −0.054*** | −0.019 | 1.606* | 0.893 | 
| (4.67) | (0.33) | (−2.13) | (−0.73) | (2.41) | (1.55) | |
| _cons | 5.703*** | 11.055*** | 0.021*** | 0.31 | 0.915*** | 8.153*** | 
| (311.02) | (6.61) | (5.62) | (2.84) | (13.68) | (3.78) | |
| F test | 60.32*** | 89.65*** | 50.88*** | 21.59*** | 57.05*** | 39.16*** | 
| R2-redust | 40.11% | 89.14% | 30.32% | 58.62% | 29.08% | 69.91% |