The design and topology of a neural network is still an important and difficult task. To solve the problems of topology posed by the introduction of connexionism, new approaches are proposed, and especially a combination of induction rules with a statistical estimation of the neuron coefficients...

From the products bought, by basket analysis we seek to infer interest, values and choice criteria and predict purchase probabilities for other products. This statistical approach relies on the existence of a few general under-lying clusters which enables the prediction of general and specific...

The hedonic price method is well adapted to the calculation of relative prices and the estimation of the quality price relationship for a complex product. The main weakness lies in the use of multiple regression for the evaluation of the coefficients when there is very little data and when the...