Table 17. Comparison of Differences Across Contingent Valuation 

 Means. 



Model Comparison 

 (Mean 1 vs. Mean 2) 



Residents vs. Nonresidents 

 Central vs. Pacific 

 First vs. Last 

 Twice vs. Half 

 All vs. Twice 

 All vs. Half 



Means are significantly different at a 95% level of 

 confidence. 



Means are significantly different at a 99% level of 

 confidence. 



Note: Model definitions are as follows: 



Resident = Current trip question 

 Nonresident^ Current trip question 



Central 



Pacific 



First 



Last 



Twice 



Half 



All 



= Current trip question 

 = Current trip question 

 = Current trip question 

 = Current trip question 

 - Hypothetical trip que 



Birds and more libera 

 = Hypothetical trip que 



and more conservative 

 = Current trip question 



Resident subsample 

 Nonresident subsample 

 Central Flyway subsample 

 Pacific Flyway subsample 

 First trip subsample 



, Last trip subsample 



stion, Twice the number of 



1 regulations subsample 



stion, Half the number of birds 

 regulations subsample 



, Entire sample 



Note: T-Statistics are calculated as follows: T-Stat= 



Mean, -Mean-, 



,fvaf^ 



Var-, 



34 



