One reason is that Northwest is a dominant carrier at his airport.
Especially hard hit were shipments to Latin America, where American is by far the dominant carrier.
Most of the workers live within easy commuting distance of the airport, where Eastern was once a dominant carrier.
And when an airline is the dominant carrier at an airport, it can keep rivals out.
Many of these leases also give dominant carriers the power to veto any large airport project.
Experience rating allowed these companies to offer consumers lower premiums than the historically dominant carrier, Blue Cross.
However, Bell Atlantic, the state's dominant carrier, wanted to spare residents the burden of having to change their numbers.
But Pan Am, whose domestic flights account for only 30 percent of its business, is not a dominant domestic carrier.
However, Bell Atlantic, the dominant carrier in the region, wanted to keep residents from having to change their numbers.
Since dislocations are often the dominant carriers of plasticity, this serves to harden the material.