| Explaining variables | East (5) | Middle (6) | West (7) |
| C | −10.120*** | −12.990*** | −10.663*** |
| (1.20) | (0.97) | (1.18) | |
| LNFIR | 0.164 | 0.758*** | 1.434*** |
| (0.29) | (0.28) | (0.32) | |
| LNSTK | 0.127*** | 0.008 | 0.099 |
| (0.03) | (0.05) | (0.06) | |
| LNRDE | 0.835*** | 0.732*** | 0.825*** |
| (0.12) | (0.14) | (0.15) | |
| LNRDP | 0.479*** | 0.560** | 0.334 |
| (0.15) | (0.23) | (0.28) | |
| LNFDI | 0.018 | 0.193** | 0.083 |
| (0.10) | (0.08) | (0.06) | |
| Obs | 110 | 80 | 120 |
| R2 | 0.95 | 0.94 | 0.87 |
| Model | FE | FE | FE |