“…To understand how this idea has come about, it is important to note that the interest on tipping has, for many years, predominantly centred on testing other explanatory frameworks. Authors have tested the relationship of customer tipping behaviours to bill size (Lynn, et al, 2012), service quality (Lynn and Kwortnik 2015;Becker, et al, 2012; Wang 2013) and/or by feelings of reciprocity (Becker, et al, 2012;Lynn 2016;Lynn 2018).…”