“…Soon, many authors started to omit using direct measures of overconfidence, and instead used various indirect measures and proxies of overconfidence (e.g. Malmendier and Tate, 2005a, 2005b; Verberne, 2010; Jouber, 2013; Park and Chung, 2017; Wong, 2017; Choi et al , 2018; Hayward and Hambrick, 1997; Adebambo and Yan, 2016). Some of them even did not measure overconfidence and instead used excessive investment or trading as a proxy for overconfidence (e.g.…”