Abstract : Beyond GDP Indicators: Fo What Uses? The elaboration of new indicators of prosperity (NIP) arouses growing interest among many actors (NGOs, scholars, civil society, regional, national and international institutions). This paper studies the conditions of institutionalization of such indicators within the official decision-making spheres. To this end, six national and regional initiatives are considered in Australia, United Kingdom, Wales, Belgium, Wallonia and Germany. For each of them, we question the effectiveness of the uses of NIP as well as the roles - instrumental, political and symbolic - that such indicators are to play in decision making. Our study of the national and regional experiences leads us to formulate ten lessons that might inform and feed current debates on the institutionalization of the NIP, notably in France. We stress the importance of proposing complementary indicators to Gross Domestic Product rather than substitutes, the supportive role of executive and legislative authorities at the highest level, the strategic role of official institutes of statistics and the importance of submitting the elaboration and choice of NIP to a democratic debate.