PDF - http://www.cpb.nl/eng/pub/cpbreeksen/document/119/doc119.pdf
Ben Vollaard
"We find evidence that stricter law enforcement is effective in reducing disorder, fear of crime, violent crime and property crime," the CPB said. "Concentrating visible police presence at 'hot spots' is effective in combating disorder, fear of crime, and property crime. As a result of proactive policing during the period 2003-2005, crime and disorder went down substantially. Fear of crime has been reduced as well."