The course aims to analyse the tourism system and policies. Specifically, the purposes are: 1. the individuation of the involved actors and related tourism policies in destinations; 2. the analysis of market equilibria with public good and bads and esternalities; 3. the examination of problems of sustainability of the tourism sector under the perspective of exploitation of natural, cultural and built resources; 4. the discussion and analysis of tourism policies such as smoothing seasonality of certain types of tourism demand, environmental policies, etc.