I am an Applied Econometrician, an Associate Professor of Economics at the University of Oxford, a Tutor and Fellow in Economics at Lady Margaret Hall, and a visiting researcher at the Federal Reserve Bank of Chicago. My research uses data to answer economic and public policy questions and develops statistical methods for untangling cause-and-effect. On the methodological side, my interests include causal inference, instrumental variables, measurement error, spillovers, and Bayesian inference. On the applied side, my recent and ongoing work spans a range of topics from childhood lead exposure, to pawn lending, to baseball. I am co-founder of SQARE.org and I blog about econometrics, statistics, and R programming at econometrics.blog.