Recently I self-published my second novel, "Agnes et Yves" on Create Space. This lead me to the library to check out books on marketing. I ran across Martin Lindstrom's "Brand Sense" and found this section on the psychology of sound and music. Here is a quote.
"A fascinating experiment once took place in a small Australian village. Local residents, alarmed by the increase in street crime got together and decided that the best way to confront the problem was to remove the offenders from the main street at nightfall. Instead of taking the more traditional more-police, greater security, and tough-on-crime stance, they chose to play classical music. Every single block began piping out sounds of Mozart, Bach, Beethoven, and Brahms. In less than a week, the town reported a dramatic decrease in crime."
Closer to home, the Bellingham Police piped out classical music around the bus station downtown. It did decrease loitering around the small police station/bus station. But I noticed that the police stopped piping the music and now loitering has increased. Perhaps the police need to bring back Mozart.