Advertising Strategy in the Presence of Reviews: An Empirical Analysis
Marketing Science, Forthcoming
51 Pages Posted: 29 Nov 2017 Last revised: 29 May 2019
Date Written: May 25, 2019
We study the relationship between online reviews and advertising spending in the hotel industry. Combining a dataset of TripAdvisor reviews with other datasets describing these hotels' advertising expenditures, we show, first, that online ratings have a causal demand-side effect on ad spending. Second, this effect is negative: hotels with higher ratings spend less on advertising than hotels with lower ratings. This suggests that hotels treat TripAdvisor ratings and advertising spending as substitutes, not complements. Third, the relationship is stronger for independent hotels than for chains, and stronger in less differentiated markets than in more differentiated markets. The former suggests that a strong brand name continues to provide some immunity to reviews and the latter that the advertising response is stronger when ratings are more likely to be pivotal. Finally, we show that the relationship between online ratings and advertising has strengthened over time, just as TripAdvisor has become more popular, implying that firms respond to online reviews if and only if consumers respond to them.
Keywords: online reviews, advertising, TripAdvisor, regression discontinuity, hotels
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