Quantitative Economic Modeling vs Methodological Individualism ?

During a long time, the Austrian Economic School was against any mathematical formalization in social and economic sciences because it would be opposed to an individualist point of view of social phenomenons. We try to find an quantitative individualism modelling way from a criticism of holist modelling. But this paper tries to improve the dilemma of the quantitative modelling : we have to choose between whole representations - which denies individuals - and individualist models which are'nt able all to represent. Each one of these models have got his own logic of elaboration (statistical, experimental etc.) but we have to consider they are complementary from a scientific point of view.