His work, which has been the subject of more than 200 articles, concerns the development of software tools (such as GAMA) to assist in the modelling and simulation of socio-environmental systems, with a view to facilitating interdisciplinary work and involving social actors in the construction of models. In this capacity, he participated in the definition of the fundamental concepts of “agent-based modelling”, while working on numerous applications of this paradigm for environmental decision support, particularly in Vietnam, where he has been collaborating with numerous partners since 1999. He has been the IRD representative in Vietnam since 1 April 2017.