examine the positive correlation between firm scale
and profit. Lun andMarlow(2011) apply a data envelopment
analysis(DEA)to evaluate the impact of CSLs' fleet capacity
on their profit and revenue.DEA is also employed by Bang etal.
(2012) to point out positive contribution of firm size and ship size
to firm performance. Yip etal.(2012) build an S-curve to formulate
the association between firm capacity and revenue.The curve can
describe well both scale economy and diseconomy of carrying
capacity.