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Sacha Bourgeois-Gironde

Professor, Université Paris 2 Panthéon-Assas


CONTACT ǀ Tel : 01 44 32 26 69









Sacha Bourgeois-Gironde’s research resorts to law, economics and cognitive sciences ; with a main disciplinary anchoring in behavioural decision-theory. The central question asked is about the degree of adequacy between the human mind and its decision-environments ; the latter being understood in terms of “institutions”. Economic institutions and their juridical foundations are analysed on the basis of criteria such as their cognitive transparency, computational simplicity, regret-minimization properties, as well as their typical social and ecological efficiency. Implications of this work in the field of environmental sciences and humanities as well as in legal theory have recently ensued.

Sacha Bourgeois-Gironde is the author in 2019 of The Mind under Axioms – decision-theory beyond revealed preferences (Academic Press) and in 2020 of Etre la Rivière – comment le fleuve Whanganui est devenu une personne selon la loi (Presses Universitaires de France).



  • Behavioral economics and public law and economics (University Paris 2)
  • “Beyond Prospect Theory”, behavioural decision-theory (The Hebrew University, Jerusalem)
  • Starting in 2021-2022, I will open a research seminar in Environmental Sciences and Humanities. The first year will be dedicated to the legal personification of natural entities.



I gladly welcome two types of students : i) those having advanced formal skills : in statistics, modelling, programming and/or numerical simulation and ii) those showing strong competence and motivation for topics lying at the boundaries of economics, law and cognitive sciences.

  • Linguistic bases of legal originalism (requires competences in natural language processing computational techniques to be applied on a corpus of legal texts in various languages).
  • The physical and legal nature of icebergs (will involve field work as well as advanced capacities in conceptual and legal analysis).
  • Positional games and power indices (requires high-level competences in mathematics : graph-theory and number-theory – and in cooperative game theory – Shapley, Shubik, etc. – in the view to formalize a positional power index.