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We estimate the strength of kin-structured migration in six human populations (five from New Guinea and one from Finland) and in one population of nonhuman primates. We also test the hypothesis that migration is not kin structured by generating a sampling distribution of the estimator under the null hypothesis of independent random migration. We are unable to detect a statistically significant level of kin-structured migration in any population. However, five of our six human populations were from Papua New Guinea, and we cannot dismiss the possibility that migration is kin structured in other parts of the world.