assistant professor p. richard hahn Teaching Winter quarter 2013 I am teaching three sections of Business Statistics. Research I am a computational statistician. I enjoy applied problems that examine the behavior of people. Recently I have been working on partial identification and sensitivity analysis in fraud detection. Decoupling shrinkage and selection in Bayesian linear models NEW A sparse factor-analytic probit model for congressional voting patterns Partial factor modeling: predictor-dependent shrinkage for linear regression An approximate likelihood for simultaneous nonlinear quantile regression A symmetric prior for multinomial probit models