“…So it can be concluded that managerial overconfidence is the attitude of managers in looking at a prospect with great confidence by overestimating the company's future earning and underestimate the company's risks. By the definitions explained earlier, managerial overconfidence can be measured using CEO's share holdings (Malmendier and Tate, 2005); Frequency of mergers and acquisitions (Doukas, 2007); Mass-media comments on managers (Brown and Sarma, 2007;Malmendier and Tate, 2008); Corporate earning forecast bias (Xia, Min dan Fusheng, 2009; Hribar dan Yang, 2016; He, Chen dan Hu, 2019); Executive compensations (Hayward and Hambrick, 1997) ; and Business survey index (Park dan Korea, 2009;Oliver, 2010). Because of the many measurement options as well as the consideration of the availability of accurate data, researchers believe that the bias in estimating manager's earnings can be a proxy for managerial overconfidence.…”