I am a statistician with research on statistics and machine learning, driven by
applications in economics and engineering.
I'm also a scientist at eBay research labs.
the gamma lasso
Distributed Multinomial Regression
(distrom R package, +textir for use in MNIR).
The Gamma Lasso
(gamlr R package).
Multinomial inverse regression for text analysis, with discussion and
rejoinder. Journal of the American Statistical
Association 108, 2013.
(textir R package,
Measuring political sentiment on Twitter:
factor-optimal design for multinomial inverse regression. Technometrics 55, 2013. (arXiv)
Contribution in Hockey with Regularized Logistic Regression, with
Gramacy and Jensen. Journal of Quantitative
Analysis of Sports 9, 2013.
piece, Chance article).
Variable Selection and
Sensitivity Analysis via Dynamic Trees with an Application to
Computer Code Performance Tuning, with Gramacy and Wild. Annals of Applied Statistics 7, 2013. (arXiv).
Estimation and Selection for Topic Models. AISTATS 2012, JMLR
W&CP 22. (maptpx R package, we8there.R example).
Mixture Modelling for
Marked Poisson Processes, with Kottas. Bayesian Analysis
Dynamic Trees for Learning and Design,
with Gramacy and Polson. Journal of the American Statistical Association 106, 2011. (arXiv, dynaTree R package)
An auto-regressive mixture model for dynamic spatial Poisson processes:
Application to tracking the intensity of violent crime. Journal of the American Statistical Association 105, 2010. (local copy)
Particle learning for general mixtures,
with Carvalho, Lopes, and Polson. Bayesian Analysis 5, 2010.
Bayesian nonparametric approach to inference for quantile
regression, with Kottas. Journal of Business and Economic
Statistics 28, 2010. (local copy)
Designing and anlayzing a circuit device experiment using treed Gaussian processes, with Lee, Gramacy, and Gray. A version of this appears as a chapter in the Handbook of Applied Bayesian Analysis, OUP 2010.
Categorical inputs, sensitivity analysis,
optimization and importance tempering with tgp version 2, with Gramacy. Journal of Statistical Software 33, 2010.
Selection of a representative sample,
with Lee and Gray. Journal of Classification 27,
Markov switching Dirichlet process mixture regression,
with Kottas. Bayesian Analysis 4, 2009.
Bayesian guided pattern search for robust local optimization,
with Lee, Gray, and Griffin. Technometrics 51, 2009. (local copy)
Fast inference for statistical inverse problems,
with Lee and Sansó. Inverse Problems 25, 2009. (local copy)
A statistical framework for the sensitivity analysis of radiative transfer models,
with Morris, Kottas, Furfaro, and Ganapol. IEEE Transactions on Geoscience and Remote Sensing 12, 2008. (local copy)
Thesis: Bayesian nonparametric
analysis of conditional distributions and
inference for Poisson point processes.