Reduced violent crime in Washington Social Indicators Research (47: 153–201, 1999)
Reduced war deaths Journal of Conflict Resolution (32: 776–812, 1988) Journal of Conflict Resolution (34: 756–768, 1990)
Reduced crime in Washington Journal of Mind and Behavior (9: 457–486, 1989)
Reduced crime in U.S. Cities Journal of Mind and Behavior (9: 457–486, 1989)
Reduced violent crime Journal of Mind and Behavior (8: 67–104, 1987)