Work packtage 3 of EMPAFISH is devoted to analyse the socio-economics impacts of MPAs and to select the best subset of indicators of MPA performance, under each management regime, considering socio-economic indicators and providing a quantitative analysis of the socio-economic performance of MPAs.The present booklet review the socio-economic literature dedicated to various aspects of marine protected areas related to ecosystem preservation, fisheries management, recreationnal activities, nd distributional consequences of MPAs and methodolical issues fos cost-benefit analsis and its application to MPAs, and the specific problem of economic valuation of non-market values. MPAs is becoming an experience field for ecnomists and sociologists ans we are just now in the starting point.