Can agents who decide independently from each other coordinate their economic activities? From the XVIIIth century, economic thought answers this question by an intuition: a coordination is possible thanks to the prices' mechanism. The general equilibrium theory explores this intuition. It constitutes by there the economic theory of a society ...

The definition of the (famous) "French-style" public service often forgets one of its dimensions, nevertheless fundamental. Its relationship in the political ideologies, that it is about the vision of the public service for the main ideologies, or about the way the political parties which refer to these integrated (or not) the public service into t