“…Kim et al (2008) also showed that when consumers' physical or material interests are threatened, they will abandon the underdog and support the top dog. The boundary conditions (brand status, brand identification, firm characteristics, personal control, type of service providers or transgressions, product type, and psychological experience of power; e.g., Kao, 2015;Goldschmied et al, 2017;Kirmani et al, 2017;Berendt et al, 2018;Li and Zhao, 2018;Jin and Huang, 2019;Kim and Park, 2020;Tang and Tsang, 2020) of the underdog effect were also discussed.…”