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When is a well-established study result that a given policy/programme/treatment produced a given outcome in a particular study setting ('there') evidence that that policy/programme/treatment will produce that outcome in a new setting ('here')? This paper insists that 'there' and 'here'
be firmly distinguished and offers in answer that we must have evidence that two further facts obtain: (a) that the policy can play the same causal role widely (widely enough to cover both here and there) and (b) that a complete set of the support factors necessary for the policy to operate
here are present in some individuals here.
Evidence & Policy is the first peer-reviewed journal dedicated to comprehensive and critical assessment of the relationship between research evidence and the concerns of policy makers and practitioners, as well as researchers.