Heritability in friendship networks
Abstract
Friendship networks account for a large part of an individuals economic success or failure in life. Using data from the German TwinLife study, we explore, within a classical twin design, to which extent friendship networks are related to genes. We find a substantial heritability component in twins network sizes and network homophily, but not in twins network closeness. Addressing indirect ways in which genes could influence network characteristics, we do not find evidence that shared hobbies affects networks.
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