Online platforms are prone to abuse and manipulations from strategic parties. For example, social media and review websites suffer from sentiment manipulations, manifested in the form of opinion spam and fake reviews. The consequence of such manipulations is the deterioration of information...

With the growth of online mental healthcare platforms, health professionals have been providing online consultation services in their spare time. However, little is known about the behaviors of health professionals on these platforms and their impact on achieving healthcare professionals' online...

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...