now. In the\rpast 50 years or so, the general trend of ownership has gone from govemment-owned or\rgovernment-supported to independent, for-profit companies. This is a result of the government\rpermit greater freedom. This trend is not yet consistent across all airlines in all regions. The\rdemand for air travel services depends on other things: needs for cargo transportation, business\rpassenger demand, leisure passenger demand, which are all influenced by macroeconomic activity\rin the market. These trends are highly seasonal, and often depend on day-of-week, or time-of-day.\rThe industry is cyclical. Four or five years of poor performance are followed by five or six years\rof gradual improvement in performance.\rLD 2C 3.D 4.A 5.B
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