Over the long term, sometimes on the scale of several centuries, these investments will shape the fundamental character of the country, the quality of its environment and its ability to meet future challenges. This underscores the importance of making decisions in the most informed manner possible, making the best evaluation of the benefits they will provide and the costs they will engender, especially since their funding is largely based on public funds, a scarce resource in general and even more so today. This explains why the State has long been concerned with developing and regularly revising the methods for carrying out these evaluations. The commission responsible for the work presented here is part of a long tradition, beginning with the first reports prepared by Marcel Boiteux in 1994 and 2001 . This collection of reports established the general doctrine and enabled progress on specific subjects, such as the discount rate, taking risks into account and the shadow price of carbon. That doctrine is based on simple principles that were conceived long ago (see box below). They consist of assessing the effects of each project for the nation as a whole, evaluating the gains in productivity or production capacity made available to enterprises, as well as increases in consumption of products and improvements in quality of life provided to citizens, and comparing these effects with the costs of investment. France Stratégie est une institution autonome placée auprès du Premier ministre, France Stratégie contribue à l’action publique par ses analyses et ses propositions. Elle anime le débat public et éclaire les choix collectifs sur les enjeux sociaux, économiques et environnementaux. Elle produit également des évaluations de politiques publiques à la demande du gouvernement. Les résultats de ses travaux s’adressent aux pouvoirs publics, à la société civile et aux citoyens. Nous contacter Données personnelles et cookies 