L’information des opérateurs, professionnels ou non, est l’outil le plus important de la confiance dans l’économie numérique et les textes européens et nationaux se sont multipliés pour l’assurer de manière de plus en plus complète. L’étude s’attachera à inventorier selon les sources (droit commun, code de la consommation, législations spéciales) et classer les différentes obligations d’information en proposant diverses typologies selon leur nature, leur objet (la chose et le prix, la durée, les modalités) et leur rôle dans le processus contractuel (information précontractuelle, information sur la formalisation du contrat, la rétractation). Elle évoquera les difficultés liées à la combinaison des règles spéciales et des règles de droit commun (contradictions, variations, chevauchements). Dans le silence des textes spéciaux, elle traitera enfin des sanctions du non-respect de l’obligation d’information selon qu’il met en cause, ou non, la validité du consentement (nullité du contrat, inopposabilité). / Information for operators, professionals or not, is the main tool of confidence in the digital economy and the European and national texts have proliferated to reinforce this in a more and more comprehensive way. Based on its origins (common law, the Consumer Code, special laws), the study will seek to make an inventory and classify the different sources of information obligations by providing different typologies adapted to their nature or purpose (the object and its price, duration, terms) and their role in the contract process (pre-contractual information, information on the formalization of the contract, the withdrawal). It will discuss the difficulties associated with the combination of special rules and common law (contradictions, variations, overlapping). In the silence of specific texts, it will also cover the penalties for non compliance with the obligation of information depending on whether it questions or not the validity of the consent (void contract, unenforceable).

The aim of this diploma thesis is to describe the problematic of business cycle and consumer surveys and represent their current development and usage. The secondary objective is to link economical and statistical bonds of business cycle surveys. First, the work describes the basic definition of business cycle surveys and their users. Further it is graphically and theoretically evaluating the current development of particular confidence indicators and their sub-questions. Subsequently is in frame of the current economic development compared development of leading indicators with the development of gross domestic product (calculated using the production method) using the HP filter. In the last part of the work are modeled one-dimensional ARIMA time series models of branch confidence indicators. Result of the work is business cycle surveys analysis in terms of basic economical and statistical ties. Completed work should serve as a material to understand business cycle survey and their importance in frame of economy development.