Meta-study: http://www.popcenter.org/Responses/video_surveillance/PDFs/Welsh%26Farrington_2002.pdf http://www.popcenter.org/Responses/video_surveillance/PDFs/W.

Meta-study: http://www.popcenter.org/Responses/video_surveillance/PDFs/Welsh%26Farrington_2002.pdf http://www.popcenter.org/Responses/video_surveillance/PDFs/W... TLDR: The value and effects of CCTV cameras are very much context-dependent. Also, nearly half of the research in this are was deemed too unreliable by the authors.