On the unbiased estimation of fixed effects in a mixed model for growth curves
- 1 January 1981
- journal article
- research article
- Published by Taylor & Francis in Communications in Statistics - Theory and Methods
- Vol. 10 (4) , 401-406
- https://doi.org/10.1080/03610928108828046
Abstract
A mixed model for growth curves is introduced. A method of estimating the variance components is indicated. It is shown that the generalised least squares estimates of the fixed effects using estimates of variance components are unbiased and an expression is obtained for the increase in variance due to the substitution of the variances by their estimates. These results are directly applied to designs with two-way elimination of heterogeneity.Keywords
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