Shah, Sayyed Sadaqat Hussain, et al. “Investor and Manager Overconfidence Bias and Firm Value: Micro-Level Evidence from the Pakistan Equity Market”. International Journal of Economics and Financial Issues, vol. 8, no. 5, Sept. 2018, pp. 190-9, https://econjournals.com./index.php/ijefi/article/view/7028.