Interestments discussed in today’s New York Times, by Laren Cohen, Andrea Frazzini, and Christopher Malloy. The gist of it: that investments by mutual funds are more likely in companies in which the manager of a fund has classmates on the board of directors, and, further, the returns on those investments are far higher than investments in which the manager does not have “old school ties.” Further, the timing of these investments is tied to particular news events from the corporation, suggestion some “information transfer” is occurring.
This is both a neat bit of research, which makes a persuasive case for the presence of information transfer. The magnitude of the effect is particularly striking when you consider that their proxies for a social network, while reasonable, are certainly noisy. That is, while attending the same school, especially in the same cohort, is certainly strongly predictive of a relationship, people do not have relationships with all of their classmates, and have many/most of their relationships with non-classmates. So this effect (almost double the return for investments associated with ties as compared to those not) is likely a fairly conservative estimate of the impact of social ties.
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