what are the major characteristics of the airline industry?
['Airline industry is an oligopolistic market structure containing the following characteristics: ... ', 'Numbers of carriers and Market Share. ... ', 'High barriers to entry 1. ... ', 'High barriers to entry 2. ... ', 'Economies of scale. ... ', 'Economies of scale 2. ... ', 'Growth through merger. ... ', 'Growth through merger 2.']