Firms and Collective Reputation: A Study of the Volkswagen Emissions Scandal

This paper uses the 2015 Volkswagen (VW) emissions scandal as a natural experiment to provide evidence that collective reputation externalities are economically significant. Using a combination of difference-in-differences and demand estimation approaches, the authors document a spillover effect from the scandal to the non-VW German auto manufacturers. The spillover amounts to an average drop of $2,057 in consumer valuations of these manufacturers’ vehicles and a 34.6% reduction in their annual sales. The authors substantiate their interpretation that the estimates reflect a reputation spillover using data on internet search behavior and direct measures of consumer sentiment from Twitter.