Economics and Business at Pompeu Fabra University.

His research has mostly focused on mathematical aspects of machine

learning including classification, density estimation,

regression, but also clustering and data compression, ranking, and

sequential prediction. He is also interested in concentration inequalities

and understanding the behavior of large random structures such as

random graphs and networks.

He has co-authored four research monographs; one on classification

(published by Springer in 1996), one on density estimation (also

Spinger, 2001a) , one on sequential prediction (Cambridge University

Press, 2006), and one on concentration inequalities (Oxford University