SUMMARY A stochastic model has been described which allows for arbitrary Poisson, Lexian and family limitation effects. This model not only provides a framework for hypothesis tests concerning the determinants of sex ratio data but provides parameter estimates of considerable interest. Application of the model to Renkonen's data suggests the presence of Lexian and family limitation effects but the absence of Poisson effects.
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Pickles et al. (1982) studied this question.
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