competitive processes between firms. Examining a cross-section of US airline city pairs, Tabacco proposes for the first time that the industry can be understood as a natural oligopoly, each airline market being dominated by one to three airline carriers regardless of market size. The author questions the extent to which airlines deliberately prevent head-to-head competition within city pair markets, and draws intriguing conclusions about competitive forces from the observed market structure. Uncovering some of the main corporate strategies of the airline industry, the book is of immediate relevance to industry managers and practitioners, as well as academic economists.

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