D. James Greiner is the Honorable S. William Green Professor of Public Law and Faculty Director of the Access to Justice Lab at Harvard Law School. His research focuses on randomized control trials in legal contexts, particularly in civil and criminal justice systems. Greiner holds a Ph.D. in statistics from Harvard University and previously practiced law, focusing on employment discrimination and voting rights. He teaches courses on civil procedure, expert witnesses, and access to justice. Greiner's work emphasizes empirical methods to evaluate legal interventions, including studies on unbundled legal assistance, the impact of representation in court, and algorithm-assisted decision-making in pretrial risk assessments. His Access to Justice Lab designs and implements experiments to assess interventions aimed at improving justice outcomes for underserved populations. Key projects include evaluating online dispute resolution systems, analyzing criminal justice record-clearing policies, and studying the effects of counsel at first court appearances. His research has been published in leading legal and statistical journals, including the Harvard Law Review and the Yale Law Journal.









