Table 4. Estimation of cost-to-carry factor

City pair and aircraft type	Cost-to-carry factor	t - value
ICNBKKA333	0.029	29.169**
ICNCDGA388	0.032	17.835**
ICNDPSA333	0.031	28.597**
ICNLAXA388	0.029	16.491**
ICNNGOB738	0.029	10.002**
ICNNRTA333	0.022	12.555**
ICNSINB773	0.037	27.599**

p<.05
p<.01