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Direct calculation of the information matrix via the EM

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A simple explicit formula is provided for the matrix of second derivatives of the observed data log-likelihood in terms of derivatives of the criterion function (conditional expectation of the complete data log-likelihood given the observed data) invoked by the EM algorithm.
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Keywords: Likelihood; Missing data; Newton–Raphson method; Standard errors

Document Type: Original Article

Affiliations: University of Rochester Medical Center, USA

Publication date: 1999-04-01

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