1. Azores Sustainable Tourism Observatory (OTA) and The Centre of Applied Economics Studies of the Atlantic (CEEAplA), University of Azores, 9500-321 Ponta Delgada, PORTUGAL
2. Faculty of Applied Sciences, WSB University, 41-300 Dabrowa Górnicza, POLAND
3. School of Business and Economics and CEEAplA, University of Azores, 9500-321 Ponta Delgada, PORTUGAL