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Brian HILL

CNRS Research Professor

Economics and Decision Sciences

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After completing studies in mathematics, logic and philosophy, and a period as Assistant Professor of Economics and Decision Sciences at HEC, Brian Hill is now Research Fellow at the French National Centre for Scientific Research (CNRS) and CNRS Research Professor at HEC Paris, where he teaches courses on decision theory and philosophy.  He has been an active researcher in areas of philosophy, logic and economics, with current interests particularly in the field of decision theory. Much of his recent research has focused on what counts as a rational reaction to severe uncertainty or ambiguity, and attempts to marry theoretical insights and tools from economics and philosophy, with an eye on practical consequences for the handling of uncertainty in concrete decisions, such as those involving environmental policy.

In logic and philosophy, he has worked on conditionals, on the dynamics of belief and preference, and on awareness; in the realm of decision, other topics of interest include state-dependent utility, indecisiveness, and social choice in the presence of uncertainty. 

Scientific articles

Confidence in preferences

Social Choice and Welfare, July 2012, vol. 39, n° 2/3, pp 273-302,

Defending the Ramsey Test: What is wrong with Preservation?

Mind, January 2012, vol. 121, n° 481, pp 131-146,

A Contraction-free and Cut-free Sequent Calculus for Propositional Dynamic Logic

Studia Logica, 2010, vol. 94, n° 1, pp 1-26, (in coll. with F. Poggiolesi)

An additively separable representation in the Savage framework

Journal of Economic Theory, September 2010, vol. 145, n° 5, pp 2044-2054,

Awareness Dynamics

Journal of Philosophical Logics, April 2010, vol. 39, n° 2, pp 113-137,

Le problème dynamique de l'induction

Dialogue: Canadian Philosophical Review/Revue canadienne de philosophie, December 2009, vol. 48, n° 4, pp 701-715,

Living without state-independence of utilities

Theory and Decision, October 2009, vol. 67, n° 4, pp 405-433,

Logic of change, Change of logic

Synthese, November 2009, vol. 171, n° 2, pp 227-234, (in coll. with O. Majer, H. van Ditmarsch)

When is there state independence?

Journal of Economic Theory, May 2009, vol. 144, n° 3, pp 1119-1134,

Towards a "Sophisticated" Model of Belief Dynamics. Part I: The General Framework

Studia Logica, June 2008, vol. 89, n° 1, pp 1-29,

Chapters edited in books

Working papers

Unanimity and the aggregation of multiple prior opinions

Cahier de Recherche du Groupe HEC , 2012

Deferral, incomplete preferences and confidence

Cahier de Recherche du Groupe HEC , 2011

Awareness and Equilibrium

Cahier de Recherche du Groupe HEC , 2010

Confidence and ambiguity

Cahier de Recherche du Groupe HEC , 2009

Confidence in preferences

Cahier de Recherche du Groupe HEC , 2009

An additively separable representation in the Savage framework

Cahier de Recherche du Groupe HEC , 2007

Dynamic Awareness

Cahier de Recherche du Groupe HEC , 2007

Living without state-independence of utilities

Cahier de Recherche du Groupe HEC , 2007

The (topo)logic of vagueness

Cahier de Recherche du Groupe HEC , 2007

Three Analyses of Sour Grapes

Cahier de Recherche du Groupe HEC , 2007

Scientific articles

Incomplete preferences and confidence

Journal of Mathematical Economics, aout 2016, vol. 65, pp 83–103,

Robust Social Decisions

American Economic Review, September 2016, vol. 106, n° 9, pp 2407-2425, (in coll. with E. DANAN, T. GAJDOS, J.-M. TALLON)

Common knowledge: a finitary calculus with a syntactic cut-elimination procedure

Logique et Analyse, June 2015, vol. 58, n° 230, pp 279-306, (in coll. with F. POGGIOLESI)

Representation theorems and the semantics of decision-theoretic concepts

Journal of Economic Methodology, 2015, vol. 22, n° 3, pp 292-311, (in coll. with M. COZIC)

Working papers


  • Habilitation a diriger des recherches (Qualified Research Supervisor), Université Paris I Panthéon Sorbonne - France
  • Doctorat de Philosophie (Ph.D. in Philosophy), Université Paris I Panthéon Sorbonne - France
  • Masters de Mathematiques et Informatique, Logique Mathematique et Fondements de l'Informatique , Université Paris Diderot - France
  • DEA de Philosophie, Histoire et Philosophie des Sciences , Université Paris I Panthéon Sorbonne - France
  • Cambridge Advanced Certificate in Mathematics, University of Cambridge - United Kingdom
  • B.A. in Mathematics, University of Cambridge - United Kingdom

Academic appointments

Academic responsabilities at HEC

  • 2007- CNRS Research Professor, Economics - Decision Science HEC Paris
  • 2007- Member of GREGHEC (CNRS) HEC Paris
  • 2006-2007 Post-doctoral researcher, GREGHEC HEC Paris

Scientific Activities

Membership in Academic or Professional Organisation

  • Econometric Society
  • Association Francaise de Sciences Economiques (A.F.S.E.)

Editorial activities

  • October 2011- Member of programme committee of LORI-III (Third International Workshop on Logic, Rationality and Interaction), Guangzhou
  • June 2011- Member of scientific committee of RUD11 (Risk, Uncertainty and Decision), Torino
  • Book Review Editor for Oeconomia: April 2012 - present
  • Reviewer, Congres de l'Association Francaise des Sciences Economiques
  • Reviewer, The Journal of Economic Theory, Review of Economic Studies, The Journal of Mathematical Economics, The Journal of Mathematical Psychology, The International Journal of Approximate Reasoning, Theory and Decision, Economics and Philosophy, Oeconomia, Games, Erkenntis, Studia Logica, Journal of Philosophical Logic, Synthese, Theoria, The Journal of Logic and Computation, Econometrica, Review of Economic Studies
  • Co-editor, Logic of Change, Change of Logic, Special issue of Synthese, November 2009
  • Member of scientific committee of RUD 2010 (Risk, Uncertainty and Decision 2010 Conference), Paris, June 2010. (
  • Member of the editorial board of Oeconomia, since October 2010

  • Conference organisation

  • 2013-2013 Workshop on decision making under uncertainty and beyond
  • 2010-2010 Member, Scientific Committee: ParisTech - Journal of Economic Theory Conference on Inequality and Risk
  • Member of scientific committee of RUD12 (Risk, Uncertainty and Decision), Evanston
  • Co-organiser of D-TEA, HEC Paris, April 2009, June 2010, June 2011
  • Co-organiser of Paris Workshop in Incomplete Preferences, March 2011
  • Four-day internal seminar at Aussois (main organiser : Philippe MONGIN)
  • Workshop From Social Choice Theory to Logical Aggregation Theory (GREGHEC, LAMSADE, CERSES; main organizers from GREGHEC: Philippe Mongin and Brian Hill)
  • Co-organiser of the Prague International Colloquium « Logic of Change, Change of Logic », September 2008, Prague, Czech Republic
  • Co-organiser of the seminar « Décision et Rationalité », GREGHEC et IHPST, 2007
  • Awards & honors

    • 2014 Medaille de bronze du CNRS