“…Alterations in travel behavior are also caused by external factors of the macro environment simultaneously affecting people of all ages (Pennington-Gray and Spreng, 2002). These period effects comprise various factors including single events such as terror attacks, which have shortand long-term impacts on travel behavior (Karl et al, 2017), pandemic crises (Romagosa, 2020), as well as long-term trends such as economic developments in the source market (Wong et al, 2016), technological advances in transportation (Castro et al, 2020), and mobile technology (Cohen et al, 2014) or climate change (Go ¨ssling et al, 2012). While modern developments in transportation permanently encourage long-distance travel, events such as economic downturns can deter people from traveling overseas (Sun and Lin, 2019).…”