The document discusses pricing strategies and promotional schemes used by domestic airlines in India to compete in the oligopolistic aviation market. It provides background on the transition from Indian Airlines monopoly to an oligopoly with multiple carriers. It then examines pricing wars that broke out between carriers like Indian Airlines, Jet Airways, and Air Sahara as they launched APEX fare schemes offering discounted tickets. Various promotional schemes under APEX like "Wings of Freedom" and "Sixer" are also summarized.