We describe in this paper a method allowing to order submodels in linear regression. A real function is attached to each submodel, allowing to graphically compare and order them. Our procedure defines an objective function depending on two factors (lack of fit and multicolinearity) with the...

Nous etablissons la notion de distance monotone entre un ensemble de variables et une variable opposee a cet ensemble. Cela permet de formaliser le lien entre deux proprietes, la coherence et la stabilite d'unsous-modele de regression et finalement d'etablir un critere de choix de modele base...

Nous nous situons, dans ce papier qui ne fait qu'etablir certains resultats demeurant a exploiter, sur le plan de methodes purement deterministes et presentons une approche qui a trait a la theorie de l'approximation. Nous nous attachons a decouvrir la divergence fondamentale existant entre un...

Aujourd'hui encore. la decision d'un choix d'echange de donnees informatisees (EDI) par le management est freinee par la dificulte de mesurer les atouts de l'entreprise face a ce concept technologique. L'objet de cette etude est de determiner les pre-requis indispensables au succes d'un projet...

We examine in this paper various consequences of the Poincari separation theorem. First, Poincari's theorem is used to prove results establishing a constrainted principal component analysis, both at the sample and at the population level. Introduction of constraints in principal component...

Cette etude analyse de maniere empirique l'impact sur le marche des action sous-jacentes de l'emission d'option sur action a la Swiss Options and Financial Futures Exchange (SOFFEX).

This paper seeks to determine whether it is sufficient to revise administered trade procedures to reduce endogenous protectionist tendencies of the trade policy mechanism.

This paper tests the existence of a risk premium in the one-month and three-month forward exchange markets.

Concepts of organizational learning abound in the literature. There has been an increasing diversity of attempts at classification, but an integrated theory is still missing. To provide some tentative answers as to why theory development id organizational learning has made such little progress,...

We use a decomposition approach to solve two types of realistic problems: block-angular linear programs arising in energy planning, and multicommodity network problems arising in capacity planning for survvable telecommunication netwroks. Decomposition is an algorithmic device that breaks down...