Abstract
In this study, we consider the problem of selecting explanatory variables of fixed effects in linear mixed models under covariate shift, which is when the values of covariates in the model for prediction differ from those in the model for observed data. We construct a variable selection criterion based on the conditional Akaike information introduced by Vaida & Blanchard (2005). We focus especially on covariate shift in small area estimation and demonstrate the usefulness of the proposed criterion. In addition, numerical performance is investigated through simulations, one of which is a design-based simulation using a real dataset of land prices.
Original language | English |
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Pages (from-to) | 316-335 |
Number of pages | 20 |
Journal | Canadian Journal of Statistics |
Volume | 46 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2018 Jun |
Externally published | Yes |
Keywords
- Akaike information criterion
- conditional AIC
- covariate shift
- linear mixed model
- MSC 2010: Primary 62J05
- secondary 62P25
- small area estimation
ASJC Scopus subject areas
- Statistics and Probability
- Statistics, Probability and Uncertainty