Thanks. I'd imagine that there would be a noticeable shift in reported crime from areas of higher CCTV concentration to those [local] areas with lower CCTV concentration. It seems that there were no particularly clear displacement effects in the case-studies in that first doc¹.
The second doc² appears to make no clearer claims on displacement either.
Mind you we've 17 years more data now and there must be several areas where CCTV has been installed, removed (or deactivated) and possibly reinstalled.
There really must be better citations than this around. I've no time to dig for them now but these don't convince me that displacement is, if anything, more than a minor effect. Moreover those docs show a shift from direct personal robbery/theft to theft from vehicles; I'd expect that would result in less bodily harm overall at the expense of broken windows and bent door frames, probably a good result.
The second doc² appears to make no clearer claims on displacement either.
Mind you we've 17 years more data now and there must be several areas where CCTV has been installed, removed (or deactivated) and possibly reinstalled.
There really must be better citations than this around. I've no time to dig for them now but these don't convince me that displacement is, if anything, more than a minor effect. Moreover those docs show a shift from direct personal robbery/theft to theft from vehicles; I'd expect that would result in less bodily harm overall at the expense of broken windows and bent door frames, probably a good result.
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¹ http://www.parliament.uk/post/pn175.pdf, 2002
² http://library.npia.police.uk/docs/hopolicers/fcdps68.pdf, 1995