The assumption of linearity is implicitly accepted in the process which generates a time series condition submitted to a ARIMA. That is why, in this paper, we shall discuss the research of long memory in the processes: the fractional ARIMA models, denoted as ARFIMA, where d and D, the degree of...

This paper presents the preliminary results of the study of the evolution of the SMEs in the information technology industry in France. This study was started during a research visit at the University Dauphine Paris, France, as a test model for a study involving SMEs from the information...

The evolution of consumer behaviour (a dual demand of a large variety and personalised products) has encouraged firms to enlarge their product range. As a result, certain products have a very short life cycle (a few weeks to a few months). The supply chain for these products cannot be exactly...

Sur la demande de l’Union française d’électricité (UFE), Jan Horst Keppler, Professeur d’économie à l’Université Paris - Dauphine, et Régis Bourbonnais, Maître de conférences à l’Université Paris - Dauphine et spécialiste en économétrie, ont entrepris une série de tests...

Comment choisir une politique d’approvisionnement adaptée aux caractéristiques des diverses chaînes logistiques ? Quelles sont les méthodes de prévision de la demande ? Comment dimensionner un stock de sécurité ? Comment évaluer la qualité des prévisions ? Comment concevoir des...

The aim of this study is to identify the micro-economic determinants of the Burgundy wine. Using yearly data, from 1980 to 1999 concerning : harvest, price downstream, inventories downstream, price uphill, inventories uphill, we proceed in two steps : - first step : we try to establish causal...