This paper examines whether sports betting markets are semistrong-form efficient—i.e., whether new information is rapidly and completely incorporated into betting prices. We use the news of ghost matches in the top European football leagues due to the COVID-19 pandemic as the arrival of public...

Consistent with outcome bias, we replicate the finding of Lefgren et al. (2015) showing that professional basketball coaches in the NBA discontinuously change their starting lineup more often after narrow losses than after narrow wins, even though this outcome is conditionally uninformative. As...