Users have proven to be a principal driving force of many innovations in different industries. Therefore, more and more firms try to identify avenues to systematically involve users into their new product development. Despite the growing interest in user-driven or user-centred innovation, both...

Online communities (OCs), especially those related to particular products or brands, have become a potent means of identifying user needs and solution ideas, thereby supporting companies to innovate. Despite their growing relevance, user innovation activities within consumer OCs still are...