Question-Answer (Q&A) forums are gaining popularity as a user-engagement tool to drive traffic on multi-service portals. In a platform market model, demand-side users seek answers from the supply-side users, since such answers can indicate value offered, reduce buyer uncertainty and offer social...

Opinion spammers exploit consumer trust by posting false or deceptive reviews that may have a negative impact on both consumers and businesses. These dishonest posts are difficult to detect because of complex interactions between several user characteristics such as review velocity, volume, and...

The familiar ’five-star’ ratings and reviews system makes it easy for consumers to use product evaluations across competing platforms to choose the product or service that is most likely to match their preferences. However, the ability to easily shop around for ratings and reviews raises a...

Content on non-profit user-generated content (UGC) platforms, such as Wikipedia, is generally created and maintained as open-collaboration projects by UGC communities who are also users of these platforms. Furthermore, the financial sustainability of these platforms depends on funding from...