Ivan Sever, Ph.D., participated in the 63rd international congress of the European Regional Science Association. The congress was held in the town of Angra do Heroismo on the Portuguese island of Terceira. He presented a scientific paper entitled "From thresholds to risk factors: Prioritization of socio-economic risks to sustainable tourism development", which is the result of research conducted in collaboration with Ana Perišić, Ph.D., and Neven Ivandić, Ph.D., who are also co-authors on the paper. The paper was presented at the congress session G35: Tourism and Overtourism Issues.