Division of labor is one of the primary adaptations of sociality and the focus of much theoretical work on self‐organization. This work has been hampered by the lack of a quantitative measure of division of labor that can be applied across systems. We divide Shannon’s mutual entropy by marginal entropy to quantify division of labor, rendering it robust over changes in number of individuals or tasks. Reinterpreting individuals and tasks makes this methodology applicable to a wide range of other contexts, such as breeding systems and predator‐prey interactions.
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Gorelick et al. (2004) studied this question.