Juliette Rouchier, Research Fellow (CR1), CNRS    




2 rue de la Charité, 13002 Marseille, France

Main page english


juliette dot rouchier at univmed dot fr 



French page in Greqam



Member of:

ESSA - European Social Simulation Association

Research topics


For any questions regarding my work, models or papers, please feel free to email me.

Three main areas in my work at the moment: markets relations, trust and quality issues and auctions


I am part of Alan Kirman's team, working on interactions and network, in GREQAM. His research revolves around the issue of price formation on markets, and I follow him in that respect. This means actual price formation - which forces to understand actors' drives, information use and choice processes, when facing a trade situation. Different market institutions hence have to be studied, from auctions to pair-wise interactions.



Since my phD, I have been interested in studying the apparition of trust in long-term relations in markets based on pair-wise interactions.

During my phD I went to Cameroon to understand reputation and familiarity in the context of herdsmen migrating population. This work was led in common wih another phD student, Melanie Requier-Desjardins. Two models were built from this research.

Recently I studied the wholesale market for fruits and vegetables of Marseille, called the Arnavaux.

I developped two models and studied the computational and relational abilities of wholesale sellers. Most of the research was led thanks to Jean-Louis Abad, a wholeseller, and in collaboration with Jean-Philippe Mazaud. Two models have already been built; this is still work-in-progress. The first draft of the model was built with David Hales.


Although the work is eventually led to understand prices dynamics, I usually focus very much on the institutional part of markets: official structure, but also unofficial organisations that are used and reproduced by agents to coordinate their interactions. Trade-off between prices and products interest me, but I am even more interested by the priority rearrangment while facing a situation: the choice between being faithfull or being opportunistic. Trust and ethical attitude are two key notions then.


In Japan, my work is focused on the same ideas: I would first like to compare attitudes for buyers and sellers involved in long-term relations, with what I know from France. Then I would like to represent negotiation behaviours in a model or help enhance / create a plateform for inter-cultural interactions.


Key words are: interactions, learning, context, evaluation, negotiation.



I developped one model on learning through auctions, with a specialist of experimental economics, Stephane Robin. We focused on double-auction process. The simulations were focussing on the influence of the type of information agents use for their learning, and their memory length. Stephane Robin, who can be found at the GATE (click members).




I also study individuals and organisations interactions in other contexts. 



I am currently working on a project with two sociologists, Emmanuel Lazega and Lise Mounier (Lamsas, Paris), on the production and reproduction of networks. The case study on which the model is built is the trade tribunal of Paris, where judges ask advices only to certain people - as in most complex system there is an interesting feed-back effects: here people who are the most central in the system get to be even more central. We try to produce this kind of results.



And appart from these individual-based analysis, I have also developped models where the represented rationality was not the one of humans, but of organisations:



With a specialist of political economics, Sophie Thoyer, a model was built to represent the collective decision-process at Europe scale. The case studied was the voting system for GMO (genetically modified organisms) dissemination in the European Union before the enlargement. Decision makers that vote in this model are Ministers from the countries and are influenced in their choices by: the Opinion of their countries, two contradictory lobbying forces that are anti-gmo NGO (non governmental organisations) and pro-gmo firms. The auite complex feed-back enables us to explore the influence of the sensitivity to different lobbies on the global results of the votes. Hence we can explore the discussions that concern how voting institutions should be built in Europe.


Public choice

A model was built with Karine Moschetti on the care market in France. The analysis is quite economics and geography oriented. I recommance you to contact her (and hence ask me for her email) for more precision.




sorry for not writing more for the moment.
see: M2M  and M2M2