(Appendix Table 6 gives an overview and a categorization of the main papers focusing on the phenonmenon and their contribution). This is done by the use of mathematical models e.g. (Hosseini and Ivanov 2019; Ivanov et al. 2015; Ivanov et al. 2013; Kinra et al. 2019; Pavlov et al. 2019; Sokolov et al. 2016) or […]