Influencer is one of the modern means of communication. Sometimes people are called opinion formers, others are opinion leaders, and third - just influencer. Collaboration with these people is an integral part of public relations and an effective brand awareness tool. Consumers are beginning to...

This dissertation comprises three essays that study online demand coming from local offline markets. In the first essay, I study two social influence effects reflected in physical proximity and in demographic similarity, respectively, on online demand evolution. As these effects can be...

Social interactions in a community influence perceptions and values of members of the community. Recently Web 2.0 technologies have stimulated rapid growth of online communities, where communications between participants are made much easier. It is important to study how participants' behaviors...