Do sports stadiums generate crime on days without matches? A natural experiment on the delayed exploitation of criminal opportunities

Crime pattern theory claims that busy places generate crime through immediate and delayed exploitation. In delayed exploitation, offenders notice criminal opportunities during opening hours but return to exploit them later. This study investigates delayed exploitation by testing whether soccer stadiums locally increase police-recorded property crime on non-game days. A soccer stadium closure created a natural experiment. We estimate linear regression difference-in-difference models to compare crime rates on non-game days around the stadium, before and after the closure. The closure reduced non-game day property crime beyond the citywide property crime drop. We conclude that criminogenic effects of busy places extend beyond their opening hours, confirming the delayed exploitation mechanism and that crime-prevention strategies should also target these places outside opening hours