Table 2.
Meta-Analysis Regressions
|
Dependent variable: Log $CS
|
||||
|---|---|---|---|---|
| Regression Model | 1 | 2 | 3 | 3c |
| Saltwater beach | 0.885** (0.304) | 0.668 (0.343) | 1.128** (0.338) | 1.128 (0.754) |
| Northeast region | 0.391 (0.315) | −0.004 (0.312) | −0.733* (0.306) | −0.733 (0.378) |
| Daytrip (vs. overnight) | 0.946** (0.290) | 0.920** (0.251) | 0.920* (0.394) | |
| Resident (vs. nonresident) | −0.478 (0.253) | −0.593* (0.247) | −0.593* (0.280) | |
| Length of beach (ft) | −0.008* (0.003) | −0.008 (0.004) | ||
| Closed in last 5 years (Y/N) | −0.772** (0.266) | −0.772** (0.284) | ||
| Constant | 2.672** (0.262) | 2.542** (0.264) | 3.319** (0.286) | 3.319** (0.298) |
|
| ||||
| Observations | 98 | 96 | 96 | 96 |
| R2 | 0.113 | 0.278 | 0.486 | |
| Adjusted R2 | 0.094 | 0.246 | 0.445 | |
| Residual Std. Error | 1.229 (df = 95) | 1.132 (df = 91) | 0.971 (df = 88) | 0.971 (df = 88) |
| F Statistic | 6.0** (df = 2; 95) |
8.8** (df = 4; 91) |
11.9** (df = 7; 88) |
28.9** (df = 7; 88) |
| AIC | 303.08 | 276.47 | ||
| Policy WTP | $51.83 | $50.61 | $21.99 | $21.99 |
*
p<0.05,
**
p<0.01
Note: Standard errors reported in parentheses. Interaction terms for beach length and closure history included in the model, but removed from table (see Supplementary Materials). Regression model 3 is the preferred model with 3c representing the same attributes, but clustered by study. The F statistic for regression model 3c is approximated assuming the robust version of the variance covariance matrix with a Wald test.