- Health Economics, Associate Editor (2009-2011)

- Expert group, Institut des Données de Santé : member (2008-2010)

- Deputy Director & Director (2005-2013) of PSE (Paris-jourdan Sciences Economiques), joint research unit CNRS-ENS-EHESS-ENPC.

- Deputy Director (1998-2004) of DELTA, joint research unit CNRS-ENS-EHESS.
   
- Head , Microsimulation project (funded by Agence Nationale de la Recherche, 2006-2009): Development and Implementation of Tax Benefit Models for France.

- Director (2006-2010) of APE (Economic Analysis and Policy) Master and Doctorate Programme (EHESS-ENS-ENPC-ENSAE-X-HEC)

- CEPREMAP co-director  of the programme « Public Economics and redistribution» (2005-08)

- University of Lausanne, Institut d’économie et de management de la santé.
Invited Professor (part time, 1998-2008)graduate courses in microeconomics, public economics, health economics.

- Ecole Polytechnique
Associate Professor  (part time, 2000-2006) undergraduate classes in macro and microeconomics.

- Caisse des dépôts et consignations, Paris (Equity Derivatives Division)
Responsable de la recherche (Research Director), 1993-94, Mathematical modeling on equity derivatives, technical support to sales.

- University of Chicago (Department of Economics)
Visiting Scholar, 1992-93. Research on the economic aspects of the control of epidemics.

- University of Stanford (Graduate School of Business)
Visiting Scholar, 1991-92. Research on dynamic general equilibrium theory.