DATA WERE COLLECTED FOR U.S. CITIES WITH POPULATIONS OF 250,000 OR MORE FOR THE YEARS 1968-1973. THE VARIATIONS IN APPREHENSION RATE BETWEEN CITIES AND WITHIN CITIES, OVER TIME, WERE DETERMINED. IT WAS FOUND THAT WIDE VARIATIONS EXIST, BOTH BETWEEN AND WITHIN CITIES OVER TIME, WHEN ARREST PRODUCTIVITY IS MEASURED BY THE RATIO OF ARRESTS PER OFFICER. WHEN COMPARING CITIES, THE RANGE IN THAT MEASURE WENT FROM A HIGH OF 12.06 TO A LAW OF 2.18. CHANGES WITHIN CITIES OVER THE TIME PERIOD 1968 THROUGH 1973 VARIED FROM AS MUCH AS A 47.7 PERCENT INCREASE TO A 39.4 PERCENT DECREASE. AN ANALYSIS WAS PERFORMED TO DETERMINE WHETHER CRIME WORKLOAD (REPORTED PART 1 CRIMES) OR POLICE RESOURCES (SWORN OFFICERS) HAD THE GREATER INFLUENCE ON THE GENERATION OF ARRESTS. BECAUSE OF THE MULTICOLLINEARITY BETWEEN THE VARIABLES, IT WAS NOT POSSIBLE TO CONCLUDE WHICH HAD THE GREATER INFLUENCE. REFERENCES ARE INCLUDED. (AUTHOR ABSTRACT MODIFIED).