C. Gonzalez Alternative Methodologies for Social Assessment of Environmental Projects The main objective of this contribution is to propose different methodologies in order to find and compare new solutions for evaluating social projects. <...> We have chosen two approaches: hedonic price and contingent valuation. <...> We emphasize the social assessment in terms of benefits of the related environmental projects. 1. <...> Conceptual Framework T he objective of social assessment is to judge on the convenience of executing a particular social project instead of others. <...> Social assessment is based on a cost-benefit comparison that truly belongs to the project; in fact, the target community decides which projects bring welfare to them. <...> The social price represents the economic value of the best alternative given the resources. <...> The social benefits are those that allow undertaking a project. <...> In order to identify them, we should first identify the different groups that will benefit from the project. <...> After that, we value the benefits from each group in monetary terms. <...> If the benefits do not have a market price, then the most suitable method for its assessments should be implemented. <...> As the benefits are a measure of social welfare, a methodology of maximization the consumers' utility is proposed. <...> An econometric analysis can be implemented for each methodology. <...> Alternative methodologies are the hedonic price and the contingent valuation; we will illustrate the economic and econometric methods in order to obtain comparable outputs. 2. <...> Method of Hedonic Price One way of obtaining the benefits of an economic valuation is to use the property prices as a function of their different characteristics and attributes which, in theory, represent all the direct benefits of households modified by the implementation of the project. <...> The price variation of the property associated with the variation of the attribute of the project is considered as a measure of benefits. <...> Российскошвейцарский семинар по эконометрике и статистике 103 To apply this method, it is important to establish a sample of properties inside and outside the project zones and to take into consideration all the attributes of the place (type of land, property characteristics, local services, etc.). <...> Concerning the price of the property, we can consult the owner directly by means of a questionnaire and then verify by a specialized expert. <...> The optimal set that the consumer obtains by maximising its <...>