Context conditions the nature of policy development. The relationship between evidence and policy is similarly conditioned in terms of the types of evidence deployed to address specific policy matters. This raises a number of interesting questions: how are different types of evidence best classified? Are there systematic linkages between context and evidence type? Do different forms of evidence hold greater sway at different points of the policy cycle? Antisocial behaviour (ASB) policy--and the way in which ASB policy in Scotland and England has diverged over time--offers a good vehicle for exploring these propositions and their implications.