Martins, Oliva M.D.Nunes, AlcinaFerreira, Fernanda A.Veloso, Cláudia M.Santos, SóniaCorreia, Alexandra I.Fonseca, Manuel JoséSilva, GorettiRachão, SusanaVieira, Elvira PachecoCarrança, PauloFernandes, Paula Odete2023-03-072023-03-072021Martins, Oliva M.D.; Nunes, Alcina; Ferreira, Fernanda A.; Veloso, Cláudia M.; Santos, S.; Correia, A.I.; Fonseca, Manuel; Silva, G.; Rachão, S.; Vieira, E.; Carrança, P.; Fernandes, Paula O. (2021). Monitoring of outdoor tourism demand. In 4th International Conference on Tourism Research [ICTR21]. Online conference. Polytechnic Institute of Porto. Vila do Conde, Portugalhttp://hdl.handle.net/10198/27545The Herfindahl-Hirschman Index (HHI) was used in order to understand the tourism competitiveness of the different sub-regions that make up the North Region of Portugal. This index is a measure which helps to analyse market concentration and at the same time determines the competitiveness of the market.engHerfindahl-hirschman indexOutdoor tourism demandCompetitivenessNorth Region of Portugalconference object