Using instant message communications and trading records of professional traders, we directly measure how investment information propagates in traders’ social networks and how it affects their trading decisions and performance. Traders are more likely to mention stocks with gains over losses,...

One of the most relevant and exciting issues in the latest decades in economics had been the asymmetric information and uncertainty, and their effects on market processes and efficiency. Some studies show that markets where information problems or/and uncertainty arise tend to be "networked",...

For two periods an expert E announces his forecast of the state to a decision-maker D who chooses action. They disagree about the precision of the probability assessments. At the end of period 1 the state is observed. In the last period E makes announcements more extreme than his forecasts....