Appendix Table 2, - Alternative specifications of production functions for vessels in the eastern tropical Pacific tuna fishery, 1966, 1967, 1968. 



Dependent variable 



Total value 

 Linear - 



Log 



Problem 1 



Reg. Coef. 

 t ratio 

 Reg. Coef. 

 t ratio 



INDEPENDENT VARIABLE 



CAPACITY 



DAYS , „r^,., PUERTO YEAR PURSE _,,.,, ,4 r.iiKi<;i4 Vint F "b 



.ccMT^ HORSEPOWER CRT' CREW ^,,.^2 RllllT SEINE' DUM 66" DUM 67" VINT F R 



ABSENT 



.124 

 4.820 



.368 

 4.660 



Problem 2 



Weighted total pound 

 Linear - Reg Coet 

 (ratio 



Log 



Reg. Coef. 5 

 t ratio 



.605 

 3.080 



.328 

 4.770 



582 



255.000 732.000 



1.180 3.500 



.026 .065 



.946 3710 



116300 132.00 .712 

 .168 127.00 .704 



Problem 4 

 Total pounds 



Linear - Reg Coef.' 



t ratio 

 Log - Reg. Coef.' 

 t ratio 



414 000 209.000 540,000 



1.9S0 1.060 2.H10 



.010 • 037 051 



.304 1,290 2.870 



-1735.000 102.00 .697 

 ,559 70.74 .649 



Problem 5 

 Weighted total pounds 

 Linear Reg. Coef.' 



t ratio 

 Log - Reg. Coef.- 

 t ratio 



1856000 69.68 .648 

 .762 75.87 ,653 



'Gross registered tonnage. 



''Equals one if vessel's home port is Puerto Rico, zero otherwise. 



^Lquals one if vessel was built after 1962, zero otherwise. 



■'Dummy variables for year of observation. 



^Regression coefficient. 



Appendix Table 3. - New England trawl fleet: average vessel data by tonnage class, 1964, 1965, 1967. 



55 



