Proximity dynamics: propositions for enriching models A case study of the collective catering's food chains

Scholars of the proximity school have first analyzed static combinations of proximities. However, since the beginning of the years 2000, the French school and the Dutch school have created new models to improve the analysis of the dynamics of proximity. The Dutch school proposed a model that uses the industry life cycle, whereas the French school developed first a micro economic model of proximity dynamics. The aim of the paper is to contribute to the development of these models especially the micro economic one. We add two dynamics to the model of TORRE (2010), a dynamic of ``failure'' of the cooperation before the end of the project, and a dynamic including the all set of projects of organizations. The case study of the food supply of collective catering in schools illustrates these different dynamics.