Our study aims to locate some networks of experts and researchers at global level, who produce new standards and measurement tools to improve the effectiveness and quality of education. For this, we are using the methodology of network analysis (Pajek) to objectify and study the links between co-publications. The definition of these links comes from a previous work in the development of a data base including 5300 references from approximately 3 500 authors. Epistemic communities are clearly identified and related to a paradigm: school effectiveness, human capital theory, international surveys in numeracy and literacy.