James Greiner's research interests include causal inference, ecological inference, election law, employment discrimination, and quantitative legal empirics.
Currently, Greiner's research focuses on statistics and litigation, including ecological inference models often used in cases under Section 2 of the Voting Rights Act, as well as the application of counterfactual frameworks of causation to civil rights issues. His current projects concern redistricting, election administration, causal inference, evaluation of delivery of legal services, and adjudicative system design.
At Harvard University, he teaches courses on civil procedure, expert witnesses, and voting regulation. Previously, Greiner practiced law for six years—three for the Department of Justice and three at Jenner & Block. He focused his practice on employment discrimination, voting rights, and the Decennial Census, but also was involved in long-running litigation related to aircraft carries and structural injunctions in long-running housing desegregation cases.
He earned his law degree at the University of Michigan and his doctorate in statistics at Harvard.