I am/have been

• associate editor of IEEE Transactions on Information Theory (1999--2002)

• associate editor of Statistics & Decisions (2002--)

• associate editor of TEST (2002--)

• associate editor of ESAIM: Probability and Statistics (2005--)

• action editor of Journal of Machine Learning Research (2005--)

• associate editor of Scandinavian Journal of Statistics (2010--)

• member of the editorial board of Machine Learning Journal (2006--)

• member of the editorial board of Foundations and Trends in Machine Learning (2007--)

• on the advisory board of International Journal of Statistics and Management Systems (2006--)

• member of editorial committee of the Butlletí de la Societat Catalana de Matemàtiques (2006--)

• guest editor (with Avrim Blum and Hans Simon) of a Special Issue on Learning Theory with selected papers from COLT 2006 of the Machine Learning Journal, published in December 2007.

• guest editor (with Ron DeVore) of a Special Issue on Mathematical Learning Theory of Constructive Approximation, published in August 2007.

• program commitee co-chair of COLT 2006 (with Hans Simon)

• program commitee co-chair of ALT 2009 (with Sandra Zilles)