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Components of Variance in Polydrug Use
International Journal of the Addictions, 1981Forty-seven people who first attended any London drug clinic in 1971 were asked at what age they first used various drugs and how frequently each was used during every subsequent year. For age of first use, substantial significant variance components due both to drugs and subjects and to the interaction between them confirmed that certain substances ...
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Transformations for components of variance and covariance
Biometrika, 1985Variance component models make various independence assumptions and typically assume effects are normally distributed. Here we assume that the data, possibly after suitable transformation, satisfy such a model. An analysis of transformations for balanced variance component models is presented, components of covariance being incorporated in the ...
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Variance Components (Components of Variance, VC)
2004Mark McCarthy, Steven Wiltshire
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The Estimation of the Variances in a Variance-Components Model
International Economic Review, 1971openaire +1 more source
Cross-Validatory Estimation of the Number of Components in Factor and Principal Components Models
Technometrics, 1978Svante Wold
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