Using the NOx budget trading program (NBP) as a quasi-natural experiment, we examine whether a reduction in air pollution enhances inventor risk-taking, thus making inventors more innovative. We find that inventors located in NBP participating states produce more patents after the introduction...

Firms can change their outstanding shares to manage their stock price levels. Those with lower stock prices tend to attract more speculative trading, which causes higher price volatility and may force their managers to excessively focus on short-term earnings at the expense of R&D and other...