Table 2.
Regression models per year (2014–2017).
| Dependent Variable: SpinOffs |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
Model |
(0) |
(1) |
(2) |
(3) |
(4) |
(5) |
(6) |
(7) |
(8) |
|
| Variables | Year | Base Model 2014 | 2014 | 2014 | 2015 | 2015 | 2016 | 2016 | 2017 | 2017 |
| UICollab | 0.035*** | 0.028*** | 0.029*** | 0.025*** | ||||||
| (0.004) | (0.005) | (0.004) | (0.005) | |||||||
| PrevCollab(5,14] | 0.914*** | 0.781*** | 0.545*** | 0.528*** | ||||||
| (0.148) | (0.155) | (0.155) | (0.158) | |||||||
| PrevCollab(14,33] | 1.273*** | 0.964*** | 0.748*** | 0.752*** | ||||||
| (0.227) | (0.221) | (0.202) | (0.206) | |||||||
| UnivReput | 0.6116* | −0.335 | 0.120 | −0.094 | 0.159 | −0.162 | 0.312 | 0.085 | 0.448** | |
| (0.2419) | (0.206) | (0.206) | (0.230) | (0.224) | (0.205) | (0.219) | (0.236) | (0.212) | ||
| MedSchl | 0.5879*** | 0.332** | 0.501*** | 0.414*** | 0.511*** | 0.507*** | 0.584*** | 0.301** | 0.400*** | |
| (0.1644) | (0.131) | (0.138) | (0.142) | (0.143) | (0.127) | (0.140) | (0.136) | (0.140) | ||
| TTOExper | 0.5595*** | 0.259* | 0.585*** | 0.376** | 0.562*** | 0.325** | 0.521*** | 0.358** | 0.543*** | |
| (0.1685) | (0.132) | (0.145) | (0.148) | (0.149) | (0.136) | (0.150) | (0.155) | (0.156) | ||
| PatentApp | 0.4443*** | 0.231** | 0.208** | 0.346*** | 0.392*** | 0.192** | 0.326*** | 0.275*** | 0.340*** | |
| (0.1104) | (0.091) | (0.100) | (0.102) | (0.104) | (0.094) | (0.101) | (0.103) | (0.106) | ||
| Constant | 0.8950 | 0.529 | −0.484 | 0.720 | 0.446 | 0.271 | 0.399 | 0.681 | 0.491 | |
| (0.6600) | (0.507) | (0.604) | (0.563) | (0.598) | (0.541) | (0.607) | (0.609) | (0.639) | ||
| Observations | 108 | 108 | 108 | 108 | 108 | 108 | 108 | 108 | 108 | |
| Log Likelihood | −262.181 | −238.976 | −242.789 | −253.385 | −255.720 | −251.112 | −261.381 | −262.413 | −267.580 | |
| theta | 2.6741 (0.640) | 7.818** (3.064) | 5.791*** (1.894) | 4.863*** (1.474) | 4.591*** (1.404) | 7.858** (3.077) | 4.679*** (1.443) | 4.925*** (1.446) | 4.204*** (1.217) | |
| AIC | 536 | 490 | 500 | 519 | 525 | 514 | 537 | 537 | 549 | |
Note: Columns 1, 3, 5 and 7 report the results of the estimates of the variable University-Company Collaborations (UICollab), and columns 2, 4, 6 and 8 report the estimates of the variable Previous Collaborations (PrevCollab) for the creation of university spin-offs in the years 2014, 2015, 2016, and 2017 respectively. *p < 0.1; **p < 0.05; ***p < 0.01. Standard errors in parentheses.