Nous discutons la pertinence de mesurer le risque par les volatilites. Nous appuyant sur les etudes recentes sur donnees de cotation et sur la specificite des produits derives, nous proposons des mesures complementaires de facon a traiter les effets volumes et temps, et a tenir compte des asymetries.
The results of a 1990 post-census survey of 30,000 French households are presented. The aim of the survey was to examine the completeness of census coverage. Results suggest an omission rate of two percent, compensated for in part by an estimated double-count of one percent. The survey provides information on reasons for these omissions, including errors concerning place of residence. (SUMMARY IN ENG)
"We introduce several [demographic] indices based on robust covariance estimation. These indices allow us to characterize the profile of social populations. These results are applied to characterize the demographic [profiles] of children suffering 'behaviour', 'personality', and 'language' troubles." (SUMMARY IN ENG)
