Virtual agents wear many different names according to their use contexts, functionalities, degrees of anthropomorphism. They can also be visible or incarnated, or not (incarnated agents are called Embodied virtual agents or EVAs). They have been widely used since the 2000's and first generated a...

The issue of trust-based personal data disclosure online remains of high importance both in social networking and online purchasing. Additionally, social networking is linked with a controversial factor of conspiracy beliefs that recently received attention because of Covid-19 pandemic....

Online social networks are used by hundreds of millions of people every day, but little is known about their effect on behavior. In five experiments, we demonstrate that social network use enhances self-esteem in users who are focused on close friends (i.e., strong ties) while browsing their...

This article examines online gift giving in the form of opinion, information, and advice that individuals post on websites. Research has highlighted altruism and reciprocity as the key motives behind such gift giving. We argue that informational gift giving is also strongly driven by status and...

Demonstrating compelling causal evidence of the existence and strength of peer to peer influence has become the holy grail of modern research in online social networks. In these networks, it has been consistently demonstrated that user characteristics and behavior tend to cluster both in space...

Third-party cookies and related 'offsite' tracking technologies are frequently used to share user data across applications in support of ad delivery. These data are viewed as highly valuable for online advertisers, but their usage faces increasing headwinds. In this paper, we quantify the...

Out-of-Stock (OOS) is a prevalent problem customers face at the POS. In this paper, we demonstrate both theoretically and empirically how OOS-induced substitution patterns can be explained and predicted by means of context and phantom theory. We further analyze the relevance of promotions, for...