Marc Leandri

Environmental and Health Economist

I am an Associate Professor (MCF HDR) in Economics at UMI SOURCE, in the Social Science Faculty of UVSQ-Université Paris Saclay.

I am an appointed expert for the ANSES Risk Agency.

In 2022-23, I was a Visiting Researcher at EconomiX-Université Paris Nanterre thanks to a CNRS grant (Délégation).

I have been Head of the Department of Economics at UVSQ-Université Paris Saclay over the 2016-2020 period.

UMI SOURCE

UVSQ

47 Bd Vauban

78047 Guyancourt France

marc.leandri at uvsq.fr

My research deploys both theoretical and empirical economic tools to address sustainability within a broad interdisciplinary framework, simultaneously tackling environmental and health issues, notably through the One Health approach.

News !

September 2025-August 2026: Visiting Researcher position at AFD (Agence Française de Développement) to develop the contribution of economics to the One Health approach in development projects.

July 2025: interview (in French) in the Dépêche des Vétérinaires on the contribution of economics to the One Health approach and on the challenge of pushing prevention on the political agenda (full text available on demand).

April 2025: re-publication of our article "Production-based pollution versus deforestation: optimal policy with state-independent and-dependent environmental absorption efficiency restoration process" in Essays on Pollution Control in Economics and Management Science – An Interdisciplinary View edited by F. El Ouardighi.

March, 23rd, new post on the role of Political Economy for One Health approach in the One Health Economics forum.

March, 10th, poster presentation at the 1st European Tick Borne Diseases Conference (ETBD): Lyme disease risk perception and protective behaviours of French forest users.

February, 11th, 2025: invited panel guest for an outreach seminar "Déjeuner des Curieux" (video) (UMR SADAPT, INRAE) on serious games in Agriculture and for One Health issues.

December, 19th, 2024: invited seminar at ERUDITE: A health economics approach of risk perceptions and self protection through the Health Belief Model. An application to tick-borne diseases prevention among French forest users.

November 12th, 2024: invited lecture at the Institut One Health on Tick-borne diseases and One Health management.

August, 30th, 2024: invited talk at the IDOH Day in Tours: One Health Economics.

July, 3rd, 2024: presentation at the EuHEA conference in Vienna: Risk perceptions and self-protection: an economic perspective on the Health Belief Model.

July, 2d, 2024: opening of the online forum One Health Economics: all contributions welcome!

May, 30th, 2024: publication in Frontiers in Public Health of the paper "One Health Economics: why and how economics should take on the interdisciplinary challenges of a promising public health paradigm", co-written with Laurent Dalmas, available in open-access.

March, 15th, 2024: pre-publication in Health Economics of the paper "Optimal self‑protection and health risk perceptions: exploring connections between risk theory and the Health Belief Model", co-written with Emmanuelle Augeraud-Véron, available in open-access.

March, 11th, 2024: appointed Socio-Economic Expert for the ANSES "Vectors" task force.

February, 13th, 2024: appointed member of the Collège des Économistes de la Santé (French Health Economics Learned Society).

December 6th, 2023: presentation for the EUGLOH Alliance Lecture Series on Planetary Health on One Health Economics with Laurent Dalmas (UMI SOURCE).

September 8th, 2023: presentation at the "Journées Tiques et Maladies à Tiques" in Strasbourg: Risk perceptions and self-protection against tick-borne diseases: Evidence from French forest users.

September 5th, 2023: presentation at the FAERE conference in Montpellier: Optimal self-protection against Ecosystem Disservices: the case of Lyme disease and forest recreational activities.

ETBD poster presentation

My research in Environmental Economics originally addressed optimal pollution control through theoretical modelling, with a focus on the dynamics of the natural assimilative capacity of the environment. (for instance the absorption of nitrates in riparian ecosystems and of CO2 in the oceans).

Credit: USDA Natural Resources Conservation Service (NRCS) Texas

Credit: NASA image library

I am currently working at the nexus Health-Environnement on the valuation and the prevention of vector-borne diseases from a risk theory perspective.

From both a theoretical and an empirical perspective my co-authors and I study how risk perceptions impact self-protection behaviour against a health risk.

In our applied approach we focus on recreational forest users in France and tick-borne disease risk (presentation of the survey in a press interview).

Credit: Shutterstock

I collaborate with colleagues from other disciplines (medecine, microbiology, ecology, virology) on the economic burden and on the prevention policies against tick-borne diseases (Lyme borreliosis, tick-borne encephalitis), in particular in an Expert Task Force for ANSES, the French public risk valuation agency. I am also a member of the ANSES Socio-Economic Expert Council.