Police productivity and crime rates: 1973-1992

According to the Uniform Crime Reports, violent crime rates increased dramatically over the past two decades. National Crime Victimization Survey data, on the other hand, indicate that the rates of violent crime remained relatively stable or dropped during this period. Which series provides a ''correct'' estimate of crime-rate trends is of more than academic interest. Highly publicized statistics on crime trends influence the public's concerns about crime and the decisions of policymakers both directly through their own perceptions of crime trends and indirectly through demands by the general public to control crime. This article compares these two major series on trends in violent crime rates in the United States for the period 1973-1992, with the goal of assessing the extent to which they measure the same underlying phenomenon: fluctuations in violent crime rates. The series are related (but not strongly). My conclusion, with some reservation is that changes in law enforcement agencies rather than changes in the rates of violent crime incidents have created the upward trend in UCR violent crime rates during the past two decades.