Stricty exogeneity tests
| Fixed effects model | Fixed effects model | Fixed effects model | Fixed effects model | Fixed effects model | Fixed effects model | |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | |
| Independent variables | ||||||
| −0.83848*** | −0.44603*** | −0.44607*** | −0.43893*** | −0.50558*** | −0.84215*** | |
| (0.00234) | (0.00688) | (0.00687) | (0.00654) | (0.00638) | (0.00230) | |
| 0.00504** | −0.13550*** | 0.01941*** | 0.02249*** | 0.01365** | −0.03269** | |
| (0.00220) | (0.05104) | (0.00712) | (0.00676) | (0.00644) | (0.01508) | |
| 0.01040*** | 0.12944*** | 0.16456*** | 0.05789*** | 0.06059*** | −0.00062 | |
| (0.00277) | (0.00893) | (0.01025) | (0.00862) | (0.00815) | (0.00331) | |
| −0.01444*** | −0.09431*** | −0.10256*** | −0.13667*** | −0.09889*** | −0.01680*** | |
| (0.00261) | (0.00844) | (0.00847) | (0.00806) | (0.00768) | (0.00254) | |
| −0.00095*** | 0.00322*** | 0.00312*** | 0.00195*** | −0.00090* | −0.00124*** | |
| (0.00016) | (0.00053) | (0.00053) | (0.00050) | (0.00048) | (0.00016) | |
| 0.83441*** | 0.83543*** | |||||
| (0.00206) | (0.00228) | |||||
| 0.21594*** | 0.04909** | |||||
| (0.06923) | (0.02045) | |||||
| −0.07176*** | 0.00652** | |||||
| (0.00997) | (0.00332) | |||||
| 0.31181*** | 0.01724*** | |||||
| (0.00718) | (0.00274) | |||||
| 0.02541*** | 0.00139*** | |||||
| (0.00042) | (0.00016) | |||||
| CONST | 0.01323 | 1.03892*** | 1.24257*** | 1.23173*** | 1.23999*** | −0.02461 |
| (0.00905) | (0.06424) | (0.02775) | (0.02623) | (0.02519) | (0.01924) | |
| Fixed effects | Yes | Yes | Yes | Yes | Yes | Yes |
| Observations | 20.178 | 20.178 | 20.178 | 20.178 | 20.178 | 20.178 |
| Number of firms | 3017 | 3017 | 3017 | 3017 | 3017 | 3017 |
| R2 | 0.92945 | 0.26285 | 0.26464 | 0.33485 | 0.39603 | 0.93581 |
| Prob > F | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 |
| Fixed effects model | Fixed effects model | Fixed effects model | Fixed effects model | Fixed effects model | Fixed effects model | |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | |
| Independent variables | ||||||
| −0.83848*** | −0.44603*** | −0.44607*** | −0.43893*** | −0.50558*** | −0.84215*** | |
| (0.00234) | (0.00688) | (0.00687) | (0.00654) | (0.00638) | (0.00230) | |
| 0.00504** | −0.13550*** | 0.01941*** | 0.02249*** | 0.01365** | −0.03269** | |
| (0.00220) | (0.05104) | (0.00712) | (0.00676) | (0.00644) | (0.01508) | |
| 0.01040*** | 0.12944*** | 0.16456*** | 0.05789*** | 0.06059*** | −0.00062 | |
| (0.00277) | (0.00893) | (0.01025) | (0.00862) | (0.00815) | (0.00331) | |
| −0.01444*** | −0.09431*** | −0.10256*** | −0.13667*** | −0.09889*** | −0.01680*** | |
| (0.00261) | (0.00844) | (0.00847) | (0.00806) | (0.00768) | (0.00254) | |
| −0.00095*** | 0.00322*** | 0.00312*** | 0.00195*** | −0.00090* | −0.00124*** | |
| (0.00016) | (0.00053) | (0.00053) | (0.00050) | (0.00048) | (0.00016) | |
| 0.83441*** | 0.83543*** | |||||
| (0.00206) | (0.00228) | |||||
| 0.21594*** | 0.04909** | |||||
| (0.06923) | (0.02045) | |||||
| −0.07176*** | 0.00652** | |||||
| (0.00997) | (0.00332) | |||||
| 0.31181*** | 0.01724*** | |||||
| (0.00718) | (0.00274) | |||||
| 0.02541*** | 0.00139*** | |||||
| (0.00042) | (0.00016) | |||||
| CONST | 0.01323 | 1.03892*** | 1.24257*** | 1.23173*** | 1.23999*** | −0.02461 |
| (0.00905) | (0.06424) | (0.02775) | (0.02623) | (0.02519) | (0.01924) | |
| Fixed effects | Yes | Yes | Yes | Yes | Yes | Yes |
| Observations | 20.178 | 20.178 | 20.178 | 20.178 | 20.178 | 20.178 |
| Number of firms | 3017 | 3017 | 3017 | 3017 | 3017 | 3017 |
| 0.92945 | 0.26285 | 0.26464 | 0.33485 | 0.39603 | 0.93581 | |
| Prob > F | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 | 0.0000 |
Note(s): ***statistical significance at 1% level; **statistical significance at 5% level; *statistical significance at 10% level
Source(s): Own elaboration