We often present data bank building (output-data calculation) as an only quantitative work. We think that economist should consider the context where his input-data were built, before to use them in his own data bank (we suggest to make an institutional and a bibliometric analysis of the...

This paper represents shortly the contribution of the Professor Lucas in modern macroeconomics, notably famous criticism of the Keynesian models. Contribution which was worth him the Nobel prize of economy 1995.

Economic simulation - as economic pattern simulation use - which is already a useful tool of searchers and managers, would be a tool of economic teacher. When teacher want explain economic theories, he can't do experiment, hence simulation would take place experiment. Simulation is an analytical...

The purpose of this paper is, through a system of software, to analyze some theoretical aggregate models. We suggest to build a disaggregated model to compare its results with these of the aggregated one. The disaggregated model uses an analogical mechanism of the individual behaviors so that a...

L'objet de ce papier n'est pas tant de présenter les principaux algorithmes utilisés en modélisation économique - nombre de manuels font des présentations de meilleure qualité et plus exhaustives - que d'en proposer une vision critique. Les modèles économiques, et plus particulièrement...

This paper is a user's manual of the French software ECHANGE 2.0 - Marché sur réseau. This software organizes transactions between from 2 to 70 individuals connected in the same LAN. There is nine goods (leisure one) that operators can buy or sell according to their inventories of goods and...

The econometricians and the economic modelers have to know and use numerical analysis not only to have a good understanding of their results, but sometimes to built their own tools. The increasing tendency to the use of large-scale models leads the softwares to reach the limit of the saturation...

The assumption we submit, because macroeconomic forcasts would be unperfect, is that behavioral equations doesn't enough describe economic behaviours through the capacity of reaction opposite to environment. Further, the forcaster belongs to his search-system, so that, may be, we must now...

The high School of Colombes (France) - Lycée Guy de Maupassant - has organized a conference where some specialists were invited to debate about "L'avenir de l'information économique". This paper reports the main ideas developed during the conference. R.Courbis (GAMA, University Paris 10),...

An economic classification is a partition of the economy which must describe it. When description is bad, why we have to change this classification, it become difficult to built long run time series data, because we cant link data between old and new classification. This paper presents our...