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Power Computation for Likelihood Ratio Tests for the Transition Parameters in Latent Markov Models
Authors:Dereje W Gudicha  Verena D Schmittmann  Jeroen K Vermunt
Institution:Tilburg University
Abstract:Latent Markov (LM) models are increasingly used in a wide range of research areas including psychological, sociological, educational, and medical sciences. Methods to perform power computations are lacking, however. This article presents methods for preforming power analysis in LM models. Two cases of tests of hypotheses on the transition parameters of LM models are considered. The first case concerns the situation where the likelihood ratio test statistic follows a chi-square distribution, implying that the power computation can also be based on this theoretical distribution. In the second case, power needs to be computed based on empirical distributions constructed via Monte Carlo methods. Numerical studies are conducted to illustrate the proposed power computation methods and to investigate design factors affecting the power of this test.
Keywords:likelihood ratio  Monte Carlo methods  transition probabilities  design factors  power computation
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