Andrew D. Martin is the Charles Nagel Chair of Constitutional Law and Political Science at the Washington University School of Law. He currently serves Vice Dean of the School of Law and the Founding Director of the Center for Empirical Research in the Law. He is also Professor of Political Science in Arts & Sciences. He is a principal of the analytics consultancy Principia Empirica LLC.

Professor Martin's expertise is in the study of judicial decisionmaking, with special emphasis on the Supreme Court and the lower federal courts. He also works extensively in the field of political methodology and applied statistics. He has published in a number of prominent law reviews and leading social science and applied statistics journals, and is a frequent presenter at conferences and workshops throughout the country. His research has been supported by the National Science Foundation, the MacArthur Foundation, and the National Institutes of Health. Professor Martin was elected as a Fellow of the Society for Political Methodology in 2012.

Professor Martin is the principal investigator of the The Judicial Elections Data Initiative, a study of litigation processes in employment discrimination suits initiated by the EEOC, and a cross-national study that examines decisionmaking in constitutional courts around the globe. He is also a collaborator on The Supreme Court Database project, and a contributor to The Discography. With his collaborator Kevin M. Quinn (UC Berkeley), Professor Martin developed the Martin-Quinn Scores that are widely used to measure ideology on the U.S. Supreme Court.

Professor Martin teaches courses in the law school on judicial decisionmaking and on social science and statistics for lawyers, in addition to graduate and undergraduate courses in political methodology in Arts & Sciences. He also regularly offers workshops on social science research methods for judges, prosecutors, and legal academics.