This article uses ARIMA and Tobit analysis to examine the impact on of
ficer behavior of changes in a policy governing ''hot'' pursuits of fl
eeing suspects. Using a 2-year time series, aggregated by week, we cal
culated the impact on pursuit behavior of two changes in pursuit polic
y: a requirement that reports be submitted regarding each pursuit and
a stipulation that pursuits could be conducted only under specified co
nditions. Each policy change produced significant reductions in the nu
mber of pursuits engaged in by officers in the department under study.