“…Additionally, virtual worlds have been used as laboratories and experimental platforms for studying economic behaviour and decision-making, areas such as the spread of virtual goods within virtual worlds (Bakshy, Karrer, and Adamic 2009;Huffaker et al 2011), labour markets (Horton, Rand, and Zeckhauser 2011), moral hazard (Tolvanen 2016), trust (Fiedler and Haruvy 2009;Fiedler, Haruvy, and Li 2011), avatar markets (Castronova 2001), and market efficiency (Golde 2008). A wide area of research based on a content within virtual worlds and online social networks is related to education (Baker, Wentz, and Woods 2009;Warburton 2009), collaborative learning (Lytras et al 2015;Różewski et al 2015) with special focus on dynamic experience management (Riedl et al 2008), interactions (Petrakou 2010), engagement , knowledge acquisition (Jankowski et al 2015), multilayer knowledge diffusion (Rożewski and Jankowski 2015), social learning innovations (Lytras et al 2014), web-based knowledge exchange (Filipowski et al 2012), and online marketplace (D'Avanzo and Kuflik 2013).…”