“…The increased attention to sustainability led to the need to establish definitions and principles (World Travel & Tourism Council, 1998) for sustainable tourism , to quantify the degree of sustainability of a touristic destination, to assess of the state of the destination (Budeanu, 2015), and to identify the policies to be fostered in that given territory (Blancas et al, 2010; Landford, 2009). To this goal, one may identify a set of indicators to assess the degree of sustainability with respect to different criteria as, for example, in Bosh (2002) and Hezri (2004) and to combine them into a unique aggregate indicator (Andria et al, 2015; Andria and di Tollo, 2015; Andria et al, 2019a, 2019b; Blancas et al, 2011). As for the criteria, many contributions focus on economic aspects, but also social and environmental issues are taken into account, especially with respect to legal compliance, political maneuvering, marketing, and public relations (Bramwell et al, 2017; Buckley, 2009; Hall, 2010).…”