Table 3.
Estimated regression coefficients from Eq. 1 of differences in percent crown cover between council and state forests
| Parameter | Dependent variable |
|||
|---|---|---|---|---|
| Crown cover (broad-leaved), % | Crown cover (broad-leaved), % | Crown cover (pine), % | Crown cover (pine), % | |
| Constant (α0) | 1.2 (P = 0.677) | −0.7 (P = 0.772) | −2.4 (P = 0.514) | −4.0 (P = 0.161) |
| Aspect | 32.2 (P = 0.000) | 30.5 (P = 0.000) | 12.2 (P = 0.170) | 12.9 (P = 0.147) |
| Population density | −25.2 (P = 0.335) | −112.5 (P = 0.188) | ||
| Population density squared | 0.71 (P = 0.805) | 16.5 (P = 0.116) | ||
| Time to road | 10.3 (P = 0.107) | 5.7 (P = 0.631) | ||
| Nearby forest stock | −0.24 (P = 0.775) | −1.7 (P = 0.424) | ||
| No. of pairs | 242 | 242 | 91 | 91 |
| No. of councils | 68 | 68 | 44 | 44 |
Two-tailed P values, in parentheses, were computed by using Huber–White robust standard errors clustered by council forest.