I develop, apply, publish, and teach the foundations of effective statistical modeling and parameter estimation for data analysis.  My research interests include nonparametric and parametric modeling and related computational methods for regression and prediction analysis; multivariate analysis; hierarchical, mixture, and multi-level modeling; cluster analysis; density estimation; variable selection; causal inference; meta-analysis; model selection and hypothesis testing; order-restricted statistical inference; network data analysis, and psychometric item response analysis.