[fre] Les centres urbains secondaires sont des points d'interconnexion entre la collecte, le commerce de gros et la vente au détail des produits vivriers. La consommation de leurs habitants diversifie les débouchés et permet ainsi d'assouplir la gestion des flux commerciaux et de diminuer les...

A hypothesis that the financial log-periodicity, cascading self-similarly through various time scales, carries signatures of a law is pursued. It is shown that the most significant historical financial events can be classified amazingly well using a single and unique value of the preferred...

A novel application of the correlation matrix formalism to study dynamics of the financial evolution is presented. This formalism allows to quantify the memory effects as well as some potential repeatable intraday structures in the financial time series. The present study is based on the...

The correlation matrix formalism is used to study temporal aspects of the stock market evolution. This formalism allows to decompose the financial dynamics into noise as well as into some coherent repeatable intraday structures. The present study is based on the high-frequency Deutsche...

[eng] A comparative analysis of peasant cocoa plantations in two forest zones one in the Ivory Coast, one in the Cameroons. They followed clearly diverging evolutions. So there is no single process explaining the emergence and the nature of those peasant plantation economies. Historical analysis...