With the advent of rising mobility and leisure time together with a structural tendency for declining airfares, tourism has become a sector of major significance in modern economies. There is a wealth of literature on the motives of tourists, on the sustainability aspects of large-scale tourism, on the expected economic and social consequences of tourism in host countries and regions, on the attractiveness of different localities and tourist sites (e.g., beaches, historico-cultural heritage, nature etc.), or on local or regional initiatives to promote tourism (e.g., through tourism packages, e-services etc.). Tourism research has indeed become a booming and timely research approach in contemporaneous economics.