Chapter 1 investigates how people's beliefs and investment behavior change in light of social information from their peers and from experts with a large-scale online experiment with participants from the U.S. and the U.K. I find that laypeople’s forecasts are strongly influenced by information...

We investigate how the experience of extreme events, such as the COVID-19 market crash, influence risk-taking behavior. To isolate changes in risk taking from other factors, we ran controlled experiments with finance professionals in December 2019 and March 2020. We observe that their...

The efficiency of financial markets and their potential to produce bubbles are central topics in academic and professional debates. Yet, little is known about the contribution of financial professionals to price efficiency. We run 116 experimental markets with 412 professionals and 502 students....