A Systems View Across Time and Space
Table 4 Hierarchical regression - family firms (dependent variable: performance)
Variables | Model 1 | Model 2 | Model 3 | Model 4 | ||||
|---|---|---|---|---|---|---|---|---|
β | t | β | t | β | t | β | t | |
Control variables | Â | Â | Â | Â | Â | Â | Â | Â |
 Age | −0.15 | −2.60 | −0.17 | −2.87 | −0.16 | 3.25*** | −0.12 | −2.55** |
 Size |  |  | 0.08 | 1.41 | 0.08 | 1.60 | 0.08 | 1.64 |
Independent variables | Â | Â | Â | Â | Â | Â | Â | Â |
 Knowledge |  |  |  |  | 0.53 | 10.88*** | 0.24 | 4.02*** |
 Innovation |  |  |  |  |  |  | 0.44 | 7.28*** |
Adjusted R2 | 0.02 | 0.02 | 0.31 | 0.41 | ||||
F value | 6.80 | 4.40 | 43.56*** | 51.89**** | ||||
Delta R2 | Â | 0.0 | 0.29 | 0.11 | ||||