Areas of Research/Interest: Medieval Jewish history

Affiliated with other departments or programs: Director- Morse Academic Plan

External Affiliations: Executive Committee, American Academy for Jewish Research, President- American Academy for Jewish Research, Chairman- Graduate Fellowship Committee, Wexner Foundation, Board of Directors, Association for Jewish Studies.

Select Publications:

Medieval Jewry in Northern France (Baltimore: Johns Hopkins University Press, 1974)

Church, State, and Jew in the Middle Ages (New York: Behrman House, 1980)

European Jewry and the First Crusade (Berkeley and Los Angeles: University of California Press, 1987)

Daggers of Faith: Thirteenth-Century Christian Missionizing and Jewish Response (Berkeley and Los Angeles: University of California Press, 1989)

Barcelona and Beyond: The Disputation of 1263 and Its Aftermath (Berkeley and Los Angeles: University of California Press, 1992)

In the Year 1096: The Jews and the First Crusade (Philadelphia: Jewish Publication Society of America, 1996)

Medieval Stereotypes and Modern Antisemitism (Berkeley and Los Angeles: University of California Press, 1997)

God, Humanity, and History: The Hebrew First-Crusade Narratives, to be published in 2000 by the University of California Press