General aspects of competition and cooperation in tourism

Competition and cooperation in tourism is a complex and broad subject. It contains manifold and different problems. It is my task to deal with general aspects only. My first idea was to base my considerations on empirical facts. However, I was not very successful in finding reliable and sufficient statistical data on competition and cooperation in tourism. Of course, we have literature enough on special problems, for instance on the competition between railway and road transport or on the cooperation among the airline corporations. However, I have found that all these publications only indirectly touch tourism.