This paper deals with the role of reciprocation in the formation of individuals' social networks, that is to what extent initiating a relation brings about its reciprocation. Following the activity of a panel of bloggers over more than a year, we seek to establish whether bloggers are mainly...

We use variation in wind speeds at surfing locations in Switzerland as exogenous shifters of users' propensity to post content about their surfing activity onto an online social network. We exploit this variation to test whether users' online content generation activity has a causal effect on...

Digital Content, PWYW Pricing, and Social Influence -- Introduction to Digital Content -- Incentives for Digital Content Contribution -- Motives for Digital Content Consumption -- Digital Content Contribution and Consumption in Live Streaming -- Social Influence in Digital Content Contribution...