| Variables | VC * TECH | VC * RD | TECH * RD |
| VC | 0.8221*** | 0.0521*** | - |
| (39.9720) | (29.1151) | ||
| TECH | 0.6265*** | - | 0.0321*** |
| (24.0862) | (21.5501) | ||
| RD | - | 0.6242*** | 0.8893*** |
| (23.9510) | (52.5310) | ||
| Intercept | −0.5121*** | −0.0333*** | −0.0251*** |
| (−19.0551) | (−16.5328) | (−18.7544) | |
| Adj-R2 | 0.8643 | 0.8019 | 0.9285 |
| Prob > F | 0.0001 | 0.0001 | 0.0001 |
| N | 349 | 349 | 349 |