Refereed publications Gibbs sampling, exponential families and orthogonal polynomials (with discussion), Statistical Science 23, 151-178. Joint work with Persi Diaconis and Laurent Saloff-Coste (2008). Rates of convergence of some multivariate Markov chains with polynomial eigenfunctions, to appear in Annals of Applied Probability . Joint work with Hua Zhou (2008).

Preprints Maximum likelihood estimation in covariance graph models, in process of submission. Joint work with Bala Rajaratnam (2008). Conjugate Wishart distributions for covariance graph models. Technical Report No. 2008-11, November 2008, Department of Statistics, Stanford University, in process of submission. Joint work with Bala Rajaratnam. Stochastic alternating projections, in process of submission. Joint work with Persi Diaconis, David Freedman and Laurent Saloff-Coste (2008). Gibbs sampling, conjugate priors and coupling, submitted. Joint work with Persi Diaconis and Laurent Saloff-Coste (2008).

Work in progress Bayesian inference in covariance graph models. Joint work with Bala Rajaratnam (2008). Dynkin's isomorphism with sign structure (2008). The joint distribution of occupation times of skip-free processes and a class of multivariate exponential distributions (2008). Semi-supervised learning using reinforced random walks (2008).