Previous research has documented strong peer effects in risk taking, but little is known about how such social influences affect market outcomes. The consequences of social interactions are hard to isolate in financial data, and theoretically it is not clear whether peer effects should increase...

Peers' valuation matters for firms' investment: a one standard deviation increase in peers' valuation is associated with a 5.9% increase in corporate investment. This association is stronger when a firm's stock price informativeness is lower or when its managers appear less informed. Also, the...

We assess the magnitude and mechanisms of workers' productivity spillovers by estimating the peer effects among those working in the same occupation across firms using the setting of security analysts. The empirical design exploits one feature of social networks: the existence of partially...