Similar Search Results

A Nondegenerate Penalized Likelihood Estimator for Variance Parameters in Multilevel Models

Chung, Yeojin; Rabe-Hesketh, Sophia; Dorie, Vincent; … - In: Psychometrika 78 (2013) 4, pp. 685-709

Group-level variance estimates of zero often arise when fitting multilevel or hierarchical linear models, especially when the number of groups is small. For situations where zero variances are implausible a priori, we propose a maximum penalized likelihood approach to avoid such boundary...

Persistent link: https://www.econbiz.de/10010998769

Handling Correlations Between Covariates and Random Slopes in Multilevel Models

Bates, Michael David; Castellano, Katherine E.; … - In: Journal of Educational and Behavioral Statistics 39 (2014) 6, pp. 524-549

This article discusses estimation of multilevel/hierarchical linear models that include cluster-level random intercepts and random slopes. Viewing the models as structural, the random intercepts and slopes represent the effects of omitted cluster-level covariates that may be correlated with...

Persistent link: https://www.econbiz.de/10011099953

Composition, Context, and Endogeneity in School and Teacher Comparisons

Castellano, Katherine E.; Rabe-Hesketh, Sophia; … - In: Journal of Educational and Behavioral Statistics 39 (2014) 5, pp. 333-367

Investigations of the effects of schools (or teachers) on student achievement focus on either (1) individual school effects, such as value-added analyses, or (2) school-type effects, such as comparisons of charter and public schools. Controlling for school composition by including student...

Persistent link: https://www.econbiz.de/10010961393

A primer on moderated mediation analysis : exploring logistics involvement in new product development

Calantone, Roger J.; Whipple, Judith M.; Wang, Xinran; … - In: Journal of business logistics : JBL 38 (2017) 3, pp. 151-169

Persistent link: https://www.econbiz.de/10011762628

SPSS and SAS procedures for estimating indirect effects in simple mediation models

Preacher, K. J.; Hayes, A. F. - 2004

Researchers often conduct mediation analysis in order to indirectly assess the effect of a proposed cause on some … outcome through a proposed mediator. The utility of mediation analysis stems from its ability to go beyond the merely … descriptive to a more functional understanding of the relationships among variables. A necessary component of mediation is a …

Persistent link: https://www.econbiz.de/10009430921

Direct and indirect effects in a logit model

Buis, Maarten L. - In: Stata Journal 10 (2010) 1, pp. 11-29

In this article, I discuss a method by Erikson et al. (2005, Proceedings of the National Academy of Science 102: 9730–9733) for decomposing a total effect in a logit model into direct and indirect effects. Moreover, I extend this method in three ways. First, in the original method the variable...

Persistent link: https://www.econbiz.de/10008518209