Correcting estimates of shared environmental variance for range restriction in adoption studies using a truncated multivariate normal model.

Abstract excerpt

A model is presented for the truncated trivariate normal distribution that arises in behavior genetic adoption designs that focus on sibling similarity to estimate shared environmental effects. The model estimates the point of truncation and shared environmentality. Both moment and maximum likelihood estimates are obtained numerically. Simulations indicate that the model and the numerical procedures perform well...

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