The editors would also like to acknowledge the review provided by Clara Barata and members of the OECD Secretariat’s Technical Advisory Group. The document was copy-edited by Elizabeth Zachary. The Conceptual Framework provides an integrated theoretical and analytical underpinning to the survey that articulates its research foci and links to existing knowledge and evidence and policy questions. Le cadre conceptuel offre a l’enquete une base theorique et analytique integree sur laquelle reposent les axes de recherche et qui fait le lien avec les connaissances et donnees existantes ainsi qu’avec les questions qui se posent quant a Faction des pouvoirs publics.