“…Other studies have taken the logarithm of the Tobin's Q ratio and entered it into an analysis (Kazempour & Aghaei, 2015;Mansourlakoraj & Sepasi, 2015;Park & Jang, 2013). Lehn and Poulsen (1989), Lang, Stulz, and Walkling (1991), Wells, Cox, and Gaver (1995), Chu (2011), Gul and Tsui (1997), Wu (2004), Chung et al (2005), Brush et al (2000), Wang (2010), Al-Zararee and Al-Azzawi (2014), Mansourlakoraj and Sepasi (2015), Rahman and Saleh (2008) and Kadioglu and Yilmaz (2017) used the undistributed free cash flow method when calculating free cash flow.…”