Department of Statistics, UC Davis, Davis, CA 95616, USA. bpdurbin@wald.ucdavis.edu|Department of Statistics, UC Davis, Davis, CA 95616, USA. bpdurbin@wald.ucdavis.edu|Department of Statistics, UC Davis, Davis, CA 95616, USA. bpdurbin@wald.ucdavis.edu|Department of Statistics, UC Davis, Davis, CA 95616, USA. bpdurbin@wald.ucdavis.edu