[R-sig-ME] R2 measure in mixed models?

[Steven J. Pierce]

Luisa,

I'm not aware of any packages for that, but I'd like the full citation for
the paper you mentioned. In exchange, here are some citations for other
papers about R-square measures in multilevel models that I've found.

Edwards, L. J., Muller, K. E., Wolfinger, R. D., Qaqish, B. F., &
Schabenberger, O. (2008). An R2 statistic for fixed effects in the linear
mixed model. Statistics in Medicine, 27(29), 6137-6157. doi:
10.1002/sim.3429

Gelman, A., & Pardoe, I. (2006). Bayesian measures of explained variance and
pooling in multilevel (hierarchical) models. Technometrics, 48(2), 241-251.
doi: 10.1198/004017005000000517

Kramer, M. (2005). R2 statistics for mixed models. Proceedings of the
Conference on Applied Statistics in Agriculture, 17, 148-160. Retrieved from
http://www.ars.usda.gov/sp2UserFiles/ad_hoc/12000000SpatialWorkshop/19Kramer
SupplRsq.pdf

Merlo, J., Yang, M., Chaix, B., Lynch, J., & Råstam, L. (2005). A brief
conceptual tutorial on multilevel analysis in social epidemiology:
investigating contextual phenomena in different groups of people. Journal of
Epidemiology and Community Health, 59(9), 729-736. doi:
10.1136/jech.2004.023929

Orelien, J. G., & Edwards, L. J. (2008). Fixed-effect variable selection in
linear mixed models using R2 statistics. Computational Statistics & Data
Analysis, 52(4), 1896-1907. doi: 10.1016/j.csda.2007.06.006

Roberts, J. K., & Monaco, J. P. (2006, April). Effect size measures for the
two-level linear multilevel model.  Paper presented at the annual meeting of
the American Educational Research Association, San Francisco, CA. Retrieved
from http://www.hlm-online.com/papers/HLM_effect_size.pdf

Snijders, T. A. B., & Bosker, R. J. (1994). Modeled variance in two-level
models. Sociological Methods & Research, 22(3), 342-363. doi:
10.1177/0049124194022003004

Snijders, T. A. B., & Bosker, R. J. (1999). Multilevel analysis. London, UK:
Sage.
Xu, R. (2003). Measuring explained variation in linear mixed effects models.
Statistics in Medicine, 22(22), 3527-3541. doi: 10.1002/sim.1572



Steven J. Pierce
Associate Director
Center for Statistical Training & Consulting (CSTAT)
Michigan State University
178 Giltner Hall
East Lansing, MI 48824
Web: http://www.cstat.msu.edu


-----Original Message-----
From: Luisa Carvalheiro [mailto:lgcarvalheiro at gmail.com] 
Sent: Wednesday, February 17, 2010 6:00 AM
To: r-sig-mixed-models at r-project.org
Subject: [R-sig-ME] R2 measure in mixed models?

Dear mixed modelers,

Is there any package for calculating R2 measures for mixed models in R (e.g.
using the measure proposed by Mittlbock; Waldhor 2000)?

Luisa