Table 4.
Econometric results.
| Model 1 | Model 2 | Model 3 | ||||
|---|---|---|---|---|---|---|
| β | S.E. | β | S.E. | β | S.E. | |
| Big6 | −0.4153 *** | −0.1555 | - | - | - | - |
| Commissioning | −0.0099 | 0.1395 | 0.1745 * | 0.0979 | −0.0136 | 0.1348 |
| Big6xCOM | 0.4642 ** | 0.1922 | - | - | - | - |
| DomusVi | - | - | 0.0154 | 0.1184 | −0.5644 ** | 0.2254 |
| Ballesol | - | - | −0.0833 | 0.1975 | −0.0932 | 0.2585 |
| Amavir | - | - | 0.6925 *** | 0.2102 | 0.7698 *** | 0.2138 |
| Orpea | - | - | −0.7479 *** | 0.1623 | −0.4638 * | 0.2814 |
| Vitalia | - | - | −0.4371 ** | 0.2032 | −1.4153 *** | 0.5497 |
| Sanitas | - | - | −0.1642 | 0.1876 | −0.3621 | 0.2449 |
| DomusVixCOM | - | - | - | - | 0.7717 *** | 0.2568 |
| BallesolxCOM | - | - | - | - | −0.0099 | 0.3723 |
| OrpeaxCOM | - | - | - | - | −0.3532 | 0.3399 |
| VitaliaxCOM | - | - | - | - | 1.1755 ** | 0.5880 |
| SanitasxCOM | - | - | - | - | 0.4148 | 0.3704 |
| Size | −0.3564 *** | 0.0846 | −0.3468 *** | 0.0829 | −0.3184 *** | 0.0827 |
| HHI | −0.0011 ** | 0.0005 | −0.0014 *** | 0.0005 | −0.0014 *** | 0.0005 |
| GDP per capita | −0.3892 * | 0.2280 | −0.4991 ** | 0.2299 | −0.4446 * | 0.2296 |
| Constant | 9.1222 *** | 2.3864 | 10.1506 *** | 2.4010 | 9.5435 *** | 2.4012 |
| N. Obs | 642 | 642 | 642 | |||
| R-squared | 0.0599 | 0.1128 | 0.1347 | |||
Dependent variable: quality score. Estimation method: OLS linear regression. *, ** and ***: significant at 10%, 5% and 1%, respectively.