-Comparative Analysis of Inequality. Description versus Explanation (Journal of Interdisciplinary Mathematics, 2009, 12:4, 565-588)

-The actuality of Education, Opportunity and Social Inequality, 2009 in M.Cherkaoui and P.Hamilton (eds) Raymon Boudon. A life in sociology, London, Bardwell Press, 357-378)

- Trend and Comparative Analysis of Inequality of Social Opportunity (Quality and Quantity, 2006, n°40, 129-143)