THIS STUDY WAS UNDERTAKEN TO DETERMINE THE EXTENT, COST, AND CAUSES OF FALSE ALARMS IN THE CITY. THE STUDY OF THE EXTENT OF FALSE ALARMS CENTERS AROUND A REVIEW OF THE NUMBER OF BURGLAR ALARM SIGNALS GENERATED FROM POLICE AND PRIVATE BURGLAR ALARM SYSTEMS. THE ANALYSIS OF COSTS OF POLICE MANPOWER AND EQUIPMENT RESOURCES DIVERTED BY FALSE ALARMS WAS BASED ON A REVIEW OF THE DIRECT PAYROLL AND EQUIPMENT COSTS INCURRED DURING A SAMPLE PERIOD OF TIME. THE EFFORT TO IDENTIFY FALSE ALARM CAUSES INCLUDED PREPARING A LISTING OF FALSE ALARM SIGNALS, DOCUMENTATION OF SIGNALS RECEIVED DURING THE STUDY PERIOD, DOCUMENTATION OF SAMPLE FALSE ALARM SIGNALS FROM SECURITY AND ALARM COMPANIES AND STATISTICAL ANALYSIS OF THE OBSERVED CAUSES OF FALSE ALARMS. FOR ALL FOUR OF THE THOR PROGRAM RESEARCH PRODUCTS, SEE NCJ-36308 THROUGH 36311.