Each consumer requires a certain quantity of services or products, and a single company usually provides only a part of this. In the banking sector, the total quantity of business a customer does is called the Size-of-Wallet of this customer and it is generally unobservable. From a company...

The definition and modeling of customer loyalty have been central issues in customer relationship management since many years. Recent papers propose solutions to detect customers that are becoming less loyal, also called churners. The churner status is then defined as a function of the volume of...