Roger Pan Than Luu is a lecturer at the University of Aix Marseille III and Director of the Methodology Laboratory of Environmental Research of Marseilles.

A chemist by training (Chemical Thesis 1967), he managed the Information Technology Department of the I.U.T. of Aix en Provence from 1972 to 1982. During this period he also set up the Methodology of Experimental Research and directed the only laboratory in France to specialise in this field. Having set up an integral teaching programme in this subject, he is much solicited by universities and industries both in France and abroad.


Karl G. Jöreskog is a lecturer in Multivariant Statistical Analysis at the University of Uppsala (Sweden), he is ex-president of the Psychometrics Society, member of the American Statistical Association, honorary member of the Royal Statistical Society and member of the Swedish Royal Academy of Sciences.

Karl G. Jöreskog has had several books published as well as numerous articles on the theory and applications of factorial analysis, co-variance structural analysis and structural equation models.

Together with Professor Dag Sörbom he developed the LISREL model and the computer programmes PRELIS and LISREL, which are widely used in experimental research in the field of social sciences and behaviour.

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