NBR estimations
| Variables | Model 1 | Model 2 | Model 3 | Model 4 |
|---|---|---|---|---|
| Openness | −2.442*** (0.476) | −2.901*** (0.445) | −3.535*** (0.365) | −3.574*** (0.359) |
| Breadth | 0.394*** (0.078) | 0.511*** (0.073) | 0.701*** (0.077) | 0.677*** (0.074) |
| Depth | 0.436*** (0.081) | 0.441*** (0.070) | 0.549*** (0.061) | 0.577*** (0.064) |
| Breadt2 | – | – | −0.153*** (0.023) | −0.127*** (0.027) |
| Depth2 | – | – | −0.079*** (0.015) | −0.087*** (0.016) |
| Betweenness | – | −0.010*** (0.003) | −0.003 (0.002) | |
| Tuscany | −0.116 (0.232) | −0.127 (0.231) | −0.082 (0.234) | −0.088 (0.235) |
| Italy | −0.008 (0.178) | −0.009 (0.177) | −0.037 (0.187) | −0.034 (0.187) |
| Europe | −0.327* (0.140) | −0.352* (0.138) | −0.208 (0.141) | −0.225 (0.143) |
| University | 0.075 (0.731) | 0.237 (0.298) | 0.239 (0.260) | 0.270 (0.269) |
| Limited liability firms | 0.025 (0.269) | 0.058 (0.258) | 0.043 (0.269) | 0.053 (0.269) |
| Partnership | −0.175 (0.267) | −0.151 (0.252) | −0.120 (0.268) | −0.107 (0.267) |
| Constant | 1.452*** (0.271) | 1.417*** (0.261) | 1.415*** (0.288) | 1.404*** (0.285) |
| Lnalpha | −0.892*** (0.222) | −0.999*** (0.245) | −1.231** (0.384) | −1.238** (0.387) |
| Log Likelihood | −709.5 | −701.3 | −684.4 | −684.1 |
| Mc Fadden’s R2 | 0.165 | 0.174 | 0.194 | 0.195 |
| LR test on overdispersion | 1322.3*** | 695.8*** | 363.3*** | 347.12*** |
| AIC | 1441.0 | 1426.7 | 1394.9 | 1396.3 |
| BIC | 1480.6 | 1469.8 | 1441.6 | 1446.6 |
| VIF Mean | 2.25 | 2.82 | 4.51 | 5.21 |
| VIF Max | 3.15 | 4.17 | 6.39 | 7.11 |
| Obs. | 269 | 269 | 269 | 269 |
| Variables | Model 1 | Model 2 | Model 3 | Model 4 |
|---|---|---|---|---|
| Openness | −2.442 | −2.901 | −3.535 | −3.574 |
| Breadth | 0.394 | 0.511 | 0.701 | 0.677 |
| Depth | 0.436 | 0.441 | 0.549 | 0.577 |
| Breadt2 | – | – | −0.153 | −0.127 |
| Depth2 | – | – | −0.079 | −0.087 |
| Betweenness | – | −0.010 | −0.003 (0.002) | |
| Tuscany | −0.116 (0.232) | −0.127 (0.231) | −0.082 (0.234) | −0.088 (0.235) |
| Italy | −0.008 (0.178) | −0.009 (0.177) | −0.037 (0.187) | −0.034 (0.187) |
| Europe | −0.327 | −0.352 | −0.208 (0.141) | −0.225 (0.143) |
| University | 0.075 (0.731) | 0.237 (0.298) | 0.239 (0.260) | 0.270 (0.269) |
| Limited liability firms | 0.025 (0.269) | 0.058 (0.258) | 0.043 (0.269) | 0.053 (0.269) |
| Partnership | −0.175 (0.267) | −0.151 (0.252) | −0.120 (0.268) | −0.107 (0.267) |
| Constant | 1.452 | 1.417 | 1.415 | 1.404 |
| Lnalpha | −0.892 | −0.999 | −1.231 | −1.238 |
| Log Likelihood | −709.5 | −701.3 | −684.4 | −684.1 |
| Mc Fadden’s | 0.165 | 0.174 | 0.194 | 0.195 |
| LR test on overdispersion | 1322.3 | 695.8 | 363.3 | 347.12 |
| AIC | 1441.0 | 1426.7 | 1394.9 | 1396.3 |
| BIC | 1480.6 | 1469.8 | 1441.6 | 1446.6 |
| VIF Mean | 2.25 | 2.82 | 4.51 | 5.21 |
| VIF Max | 3.15 | 4.17 | 6.39 | 7.11 |
| Obs. | 269 | 269 | 269 | 269 |
Notes:
Legend: standard errors in parenthesis. Significance:
***0.001;
**0.01;
*0.05
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