Ludovico Boratto obtained his Master degree in Computer Science Technologies in 2007. From 2008 he is a PhD student in Computer Science at the University of Cagliari. His research topics include recommender systems and social networks. He worked on group recommender systems that adapt to constraints imposed by the system by clustering users of similar users. He also worked on algorithms to cluster tags in a tagging system. Recently he worked on market segmentation algorithms that exploit implicit information coming from query logs.