Colin Cameron is professor of economics at the University of California, Davis. He is also a member of the UCD Graduate Group in Statistics, a faculty member of the Center for Health Services Research in Primary Care at UC Davis, serves on several university committees, and is a Visiting Professor at the School of Economics at the University of Sydney. He is associate editor of The Stata Journal. Dr. Cameron is the co-author of three graduate-level books in microeconometrics methods (Microeconometrics: Methods and Applications, Microeconometrics using Stata, and Regression Analysis of Count Data) and has presented many short courses around the world.