Platforms exploit consumers' strong personal preferences for a particular payment system to set payment restrictions and discriminatory strategies resulting in unfair competition. This harms users' rights, imposes additional costs on users, and hinders the healthy development of the platform...

Platforms exploit consumers' strong personal preferences for a particular payment system to set payment restrictions and discriminatory strategies resulting in unfair competition. This harms users' rights, imposes additional costs on users, and hinders the healthy development of the platform...

We analyze competition among clubs in which the status of club members is the crucial added value accruing to fellow club members through social interaction within the club (e.g. in country clubs, academic faculties, or internet communities). In the course of competition for new members, clubs...