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On the optimum number of levels in the one-way model with random effects
Norell, Lennart, (2003)
Use of Within-Primary-Sample-Unit Variances to Assess the Stability of a Standard Design-Based Variance Estimator.
Jang, Donsig, (2009)
Structured additive regression for multicategorical space-time data: a mixed model approach
Kneib, Thomas, (2004)