Postmarital residence rules and transmission pathways in cultural hitchhiking
Carrignon S, Crema ER, Kandler A, Shennan S.
Abstract
Population dispersal and admixture can promote the spread of adaptive cultural traits, such as agriculture, in a geographic region. In some circumstances, this process can lead to the spread of selectively neutral traits that are transmitted together with adaptive ones, leading to what some refer to as cultural hitchhiking. Here, through an individual-based simulation, we demonstrate that factors such as postmarital residence rules, probability of postmarital social learning, sex-biased transmission, and transmission pathways can all impact the degree of hitchhiking and intergroup cultural diversity. Our results demonstrate how intergroup exogamy is a complex phenomenon that can theoretically lead to a substantially wide range of expected patterns. Keywords: cultural hitchhiking, sex-biased transmission, transmission pathways, postmarital residence rules, individual-based modeling
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