Using Spilerman's (1970b) data on the timing and locations of race rio
ts from 1961 to 1968, I use event history analysis to investigate the
effects of local conditions on city-level hazard rates of rioting. Fir
st, several structural strain and social-psychological arguments, whic
h were the focus of Spilerman's original studies, are reexamined in li
ght of event history analysis. Second, I reinterpret ethnic competitio
n arguments recently used to explain a wide variety of collective viol
ence, and apply these ideas to the 1960s' riots. Third, I test two mod
els of the diffusion of rioting. Like previous analyses, my findings f
ail to support structural strain theories. Contrary to previous analys
es however, the size of the non-White population is not the singular p
redictor found for the 1960s' riot locations. Instead my results suppo
rt both competition and diffusion arguments.