Using detailed social broadcasting data from an online charitable giving campaign on Twitter, we evaluate two competing models of economic incentives on online pro-social behavior. Specifically, we focus on the effectiveness of gratitude-embedded messages on online charitable giving behavior,...

We conduct an experiment where subjects read online news articles and are shown ads for brands next to those articles. Using eye-tracking technology, we measure the attention that each individual devotes to each article and ad. Then, respondents choose between cash or vouchers for the brands...