A store was vandalized repeatedly over a six-month period   When discussing the problem with a friend, the store owner mentioned having heard that bright lighting around the perimeter of commercial establishments had been known to reduce the incidence of vandalism  Three months later, the store owner reported to the same friend that there had been no incidents of vandalism since their previous conversation
The friend concluded that bright lighting had been installed around the perimeter of the store
There had been an increase in police patrolling of the area.