“…Employing various proxies for uncertainty, several authors report a negative and significant relationship between investment and 1 This structural model of the global oil market has been widely used in the literature, for example, Baumeister and Kilian (2015), Baumeister and Kilian (2016), Kilian and Lee (2014), Kilian (2017) and Herrera and Rangaraju (2018 Abel (2018), in a study of the relationship between investment, Q and cash flow, shows that cash flow has explanatory power for investment and this effect is even larger for faster growing firms that are likely to be financially constrained. 6 See, e.g., Cukierman (1980), Bernanke (1983), McDonald and Sigel (1986), Pindyck (1991), Dixit and Pindyck (1994), and Chirinko (1993).…”