Statistical Model for Wildlife Viewing

Dependent Variable is the Natural Log of Consumer Surplus (2014 Dollars)       

Variable

Coefficient
Robust
Std. Err.

z

P > |z|

[95% Conf. Interval]
Sample
Mean
Alaska 0.717 0.24 2.99 0.003 0.248 1.187 0.035
Pacific Coast 0.588 0.134 4.38 0.0 0.325 0.852 0.094
Intermountain 0.479 0.143 3.36 0.001 0.199 0.759 0.231
Northeast 0.297 0.154 1.93 0.054 -0.005 0.6 0.344
Southeast 0.376 0.157 2.39 0.017 0.068 0.685 0.228
Public Land Only -0.741 0.247 -2.99 0.003 -1.226 -0.256 0.263
Birdwatching Only -1.446 0.307 -4.7 0.0 -2.049 -0.843 0.056
General Wildlife Viewing -1.46 0.33 -4.43 0.0 -2.106 -0.814 0.909
Nonresidents Only 0.929 0.213 4.36 0.0 0.511 1.346 0.185
Method (1 if stated preference, 0 if revealed preference) -1.108 0.303 -3.66 0.0 -1.702 -0.514 0.89
DC_CVM (1 if CVM and dichotomous choice, 0 otherwise) -0.323 0.151 -2.13 0.033 -0.619 -0.026 0.218
RP_Truncate (1 if revealed preference and observations truncated, 0 otherwise) -0.772 0.147 -5.24 0.0 -1.06 -0.483 0.027
Constant 5.755 0.391 14.7 0.0 4.988 6.522 0.0
Observations372
Wald chi2(12)1235.51
Prob > chi20.0
Log pseudolikelihood-280.304
Random-effects ParametersEstimateStd. Err.[95% Conf. Interval]
Study Level0.4580.1060.291  0.72
Residual0.2170.0270.17   0.276