HIGHLIGHTS
- who: ID et al. from the of Statistics, Federal University of Amazonas, Manaus, Brazil have published the research: Increasing the flexibility of mixed models by using fractional polynomials, in the Journal: (JOURNAL)
- what: Simulation studies from Ambler and amp; Royston indicate the approach performs reasonably well for practical use. The sequence of steps the authors propose is based on recommendations generally accepted as common sense, that is, first propose a well-specified mean model, then model the variance-covariance structure and then, with the variance-covariance model fixed, simplify the mean model. The model-building . . .
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