He has two decades’ experience with probabilistic linkage theory and its application to motor vehicle crash and health care databases. As the principal investigator for the Utah Crash Outcome Data Evaluation System (CODES) Project and the CODES Data Network Technical Resource Center, Dr. Cook led an effort to standardize probabilistic linkage practices and coding of data sets among all participating states. He has authored more the 40 papers and technical r eports on probabilistic linkage theory and analysis of linked databases.