| Journals - Sixteenth Century Journal, Co-editor (1996- ); Editorial Board (1990-96)
- American Historical Review, Board of Editors 2005-
- Sixteenth Century Essays and Studies, Advisory Board, 1997-
- History Compass, Editorial Board, 2004-
- Archiv fuer Reformationsgeschichte Literaturbericht, Review Editor, 1990-2005
- Church History, Advisory Council, 1999-2004
- Journal of Womens History, Editorial Board, 1999-2004
- Archiv fuer Reformationsgeschichte , Co-editor, 1992-96
Encyclopedias and Handbooks - National Geographic Concise History of the World, Board of Consultants
- Encyclopedia of Monasticism, Advisory Council
- Encyclopedia of Witchcraft, Editorial Board
- Oxford Encyclopedia of Women in World History, Advisory Board
Series - Problems in European Civilization. Houghton-Mifflin. Series Editor
- Reformation Texts with Translations (1350-1650) Marquette University Press, Series Editor
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