Transcription of Title stata.com xtreg — Fixed-, between-, and random ...
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fixed -, between-, and random -effects and population - averaged linear modelsDescriptionQuick startMenuSyntaxOptions for RE modelOptions for BE modelOptions for FE modelOptions for MLE modelOptions for PA modelRemarks and examplesStored resultsMethods and formulasAcknowledgmentsReferencesAlso seeDescriptionxtregfits regression models to panel data. In particular,xtregwith thebeoption fits random -effects models by using the between regression estimator; with thefeoption, it fits fixed -effectsmodels (by using the within regression estimator); and with thereoption, it fits random -effectsmodels by using theGLSestimator (producing a matrix-weighted average of the between and withinresults).
8xtreg— Fixed-, between-, and random-effects and population-averaged linear models force specifies that estimation be forced even though the time variable is not equally spaced. This is relevant only for correlation structures that require knowledge of the time variable.
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