“…After excluding observations with missing data, my final sample consists of 7706 firm-year observations. 4 Prior studies have examined various market and firm characteristics that affect innovation, including the participation of venture capital (Kortum & Lerner, 2000;Tian & Wang, 2014), especially corporate venture capital (Chemmanur, Loutskina, & Tian, 2014), CEO overconfidence (Hirshleifer, Low, & Teoh, 2012), analyst coverage (He & Tian, 2013), private ownership (Ferreira, Manso, & Silva, 2014), involvement of institutional investors (Aghion, Van Reenen, & Zingales, 2013;Ferreira et al, 2014), conglomerate form (Seru, 2014), competition (Aghion, Bloom, Blundell, Griffith, & Howitt, 2005), stock liquidity (Fang et al, 2014), debtor-friendly legal environments (Acharya & Subramanian, 2009), stringent labor laws and lower union powers (Acharya, Baghai, & Subramanian, 2013;Bradley, Kim, & Tian, in press), and financial market development (Hsu, Tian, & Xu, 2014). 5 The sample period starts in 1996 because it's the first year that director data become available in the RiskMetrics database.…”