My research is on general biostatistical issues in epidemiology, and I am a long time collaborator on a number of important prospective (cohort) studies of cancer and other diseases. These include the Atomic Bomb Survivors Study, the Multiethnic Cohort Study, and the Children's Health Study. I participate in many other projects in the Preventive Medicine Department at USC. I have particular interest in measurement error issues in dosimetry for radiation epidemiology and in dietary assessment for nutritional epidemiology. I have recently begun working on association-based testing for the influence upon cancer risk of genomic variation in candidate genes using nested case-control studies within the MEC, with special emphasis on haplotype-based risk estimation and haplotype-tagging SNP selection. See the publications and software development list below, for further information.