Abstract
This study analyzes the impact of offline television advertising on multiple metrics of online chatter or user-generated content. The context is a quasi experiment in which a focal brand undertakes a massive advertising campaign for a short period of time. The authors estimate multiple dimensions of chatter (popularity, negativity, visibility, and virality) from numerous raw metrics using the content and the hyperlink structure of consumer reviews and blogs. The authors use the method of synthetic control to construct a counterfactual (synthetic) brand as a convex combination of the rivals during the preadvertising period. The gap in the dimensions of chatter between the focal brand and the synthetic brand in the test versus advertising periods assesses the influence of advertising. Offline television advertising causes a short but significant positive effect on online chatter. This effect is stronger on information-spread dimensions (visibility and virality) than on content-based dimensions (popularity and negativity). Importantly, advertising has a small short-term effect in decreasing negativity in online chatter. Data and the online appendix are available at https://doi.org/10.1287/mksc.2017.1040
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