Jefferson Institute Staff and Associates Biographical Information



Joan E. Jacoby
Executive Director

Joan Jacoby has been the Executive Director of the Jefferson Institute for Justice Studies since its inception in 1980.

Before founding Jefferson Institute, Joan was the executive director of the National Center for Prosecution Management and a research associate with the Bureau of Social Science Research. Prior to that she was the director of the Office of Crime Analysis in the District of Columbia Government.

Her recent work has involved evaluations of the Violent Offender Prosecution Programs and the Multi-jurisdictional Drug Prosecution and Local Drug Prosecution programs in Illinois; nationwide evaluations of community policing and its impact on criminal justice, an analysis of prosecutor resources in North Carolina and management appraisals of the prosecuting attorney’s office in Kalamazoo County, MI . She directed a resource and staffing analysis of the criminal adjudication system in Marin County, CA and a study of the resources of the North Carolina Clerks of Superior Court. Her long-term project is the BJA funded demonstration program called "Promoting Innovation in Prosecution"

Joan is the author of a book, The American Prosecutor: A Search for Identity and co-author (with Ed Ratledge) of a book, A Handbook of Artificial Intelligence and Expert Systems for Law Enforcement. She presently is collaborating with Ed Ratledge on a series of books relating to prosecutorial discretion, performance measurement, and practices/procedures.

Joan has a BA in Sociology from Boston University and an MA in Statistics from American University.


Edward C. Ratledge
University of Delaware

Ed Ratledge has been the director of the Center for Applied Demography and Survey Research at the University of Delaware since 1978. He has a faculty rank of Associate Professor. He has been associated with Joan Jacoby since 1972 and with the Jefferson Institute since 1980.

Ed’s expertise lies in information systems, multivariate statistics, criminal justice and public sector economics. He teaches graduate courses in database design and administration, and computing for public administration.

His research activities relate to decisionmaking and information systems. Decisionmaking theory has been applied in all aspects of prosecutor/defender performance as well as pre-trial release decisions and sentencing guidelines. Information systems applications range from large-scale criminal history systems, program evaluation systems, management information systems to artificial intelligence and expert systems.

He worked with the Jefferson Institute on all of its projects and has co-authored many of JI’s reports. He is co-author with Joan Jacoby of a book Handbook for Artificial Intelligence and Expert Systems for Law Enforcement. In addition Ed has been active in comparative criminal justice matters, He was an instructor for the United Nations Far East Institute, Tokyo, Japan, conducted a Training Course for Effective and Innovative Counter Measures against Economic Crime, and conducted a Workshop on Computerization of Criminal Justice Information.

He has a BS and MS in Economics from the University of Delaware.

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