“…On the other hand, the case of U.S. firms is chosen because the United States is the largest economy (with a GDP of $18.5 trillion in 2016) and the biggest stock market (with a market capitalization of $27.3 trillion in 2016) in the world. Furthermore, previous findings for U.S. firms are still inconclusive regarding the relationship between environmental and financial performance (e.g., Clarkson, Li, Richardson, & Vasvari, ; Hassan, ; King & Lenox, ; Konar & Cohen, ; Lucas & Noordewier, ; Nollet, Filis, & Mitrokostas, ). For these reasons, the data sample investigated in this study is composed of 361 U.S. firms that possess at least one green patent over the 2007–2016 period, according to the U.S. Patent and Trademark Office (USPTO).…”