“…The principle of congruity, in the context of a message between two parties, predicts an individual's attitude change, taking into consideration the evaluation of both the content and the source of the message. In a two-party collaborative deal-negotiation setting, the attitude of one party regarding the contribution of the 7 Although this principle has been explored in other contexts (Brady and Sniderman, 1985;Fatas-Villafranca et al, 2011;Gross and Wiedmann, 2015;Olshavsky and Miller, 1972;Perkins and Forehand, 2012;Salciuviene et al, 2010;Shapiro, 1969;Styvén et al, 2020;Zhang, 2010), including international business and management studies (Buckley et al, 2015;Vohra and Davies, 2020;Walsh et al, 2014), it has had limited application to international collaboration.…”