Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
We employ a sample of 748 environmentally-friendly (or “green”) firms listed on U.S. stock exchanges to extend studies of the effects of socially responsible investment (SRI) on stock investment returns and the performance of initial public offerings (IPOs) and seasoned equity offerings (SEOs). Our empirical tests document positive and statistically significant excess returns for our environmentally-friendly firms and their IPOs and SEOs, in contrast to our control IPO and SEO samples which underperform. In summary, a “green” equity premium is evident in returns calculated from a variety of benchmarks.