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Résumé :
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The shift from evidence-based to evidenceinformed policy is a welcome recognition that evidence is neither value-free nor uncontested. The relationship between evidence and policy is complex and not a rational, linear one. The hunger for better knowledge to inform policy and practice has tended to overlook, or deny, the fundamentally political nature of policy-making and the often limited role of scientific evidence in its outcome. Much can be learnt from the experience of getting evidence into policy and practice in the face of competing notions of what constitutes evidence and where there is scepticism as to its value. Interpreting and using different types of evidence to inform and change policy is recognized by WHO through the work of the Evidence Informed Policy Network and other initiatives. These acknowledge that complex systems demand new and different approaches in bringing about change, and that evidence is one among many tools in that process
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