We explore the influence of city-level business cycle fluctuations on crime in 20 large cities in the United States. Our monthly time-series analysis considers seven crimes over an approximately 20-year period: murder, rape, assault, robbery, burglary, larceny, and motor vehicle theft. Short-run changes in economic conditions, as measured by changes in unemployment and wages, are found to have little effect on city crime across many cities, but property crimes are more likely to be influenced by changes in economic conditions than are more violent crimes. Contrary to the deterrence hypothesis, we find strong evidence that in many cities more arrests follow an increase in crime rather than arrests leading to a decrease in crime. This is true especially for the more visible crimes of robbery and vehicle theft and suggests that city officials desire to remove these crimes from the public’s view.