The capabilities of network technologies have facilitated the growth of electronic commerce. Major issues — notably, security and product quality uncertainty — still pose serious challenges to the further adoption of electronic commerce. Traditional market transactions have a long history...

We set up a game-theoretic model to examine the oligopolistic price competition, considering two features of online search: the existence of a common search ordering and shoppers who have non-positive search cost. We find that in equilibrium firms set their prices probabilistically rather than...

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...

The long tail phenomenon has been attributed to both supply side and demand side economies. While the cause on the supply side is well-known, research on the demand side has largely focused on the awareness effect of online information that helps consumers discover new and often niche products....

Organizations face a competitive certification market for their statements, the statements do not convince third parties unless certified, the organizations are sometimes better served by a lie, and honest mistakes are possible. In our model of such a market: if certifiers are liable for...