Kontogianni, A.; Tourkolias, C.; Machleras, A.; Skourtos, M. - In: Ecological Economics 79 (2012) C, pp. 97-104
Non-market valuation approaches for estimating the social value of biodiversity and individual species need to enhance their policy relevance. The concept of service-providing unit (SPU) may help achieve this objective by promoting the systematic quantification of the key components of nature...