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Title: Nesting random effects factors in fixed effects factors Authors:  Dario Ferreira - University of Beira Interior (Portugal) [presenting]
Sandra Ferreira - University of Beira Interior, Covilha (Portugal)
Celia Nunes - University of Beira Interior (Portugal)
Joao Mexia - New University of Lisbon (Portugal)
Abstract: Balanced fixed effects models are extended into mixed models, obtaining an enrichment of these models, without increasing the number of required observations. We start by obtaining a least square like estimator of the variance components, which through its determination coefficient gives a validation, or not, of the model. Next, we carry out inference on the estimable vectors. Then, we consider the special case in which the mean and the vector of residues are independent.