Celebrity Endorsements, Firm Value, and Reputation Risk: Evidence from the Tiger Woods Scandal
研究老虎伍兹丑闻对其赞助商及竞争对手股票市场的影响，发现赞助商市值损失超2%，且部分损失被竞争对手获取，表明名人代言存在声誉风险。
We estimate the stock market effects of the Tiger Woods scandal on his sponsors and sponsors' competitors. In the 10–15 trading days after the onset of the scandal, the full portfolio of sponsors lost more than 2% of market value, with losses concentrated among the core three sponsors: Electronic Arts, Nike, and PepsiCo (Gatorade). Sponsors' day-by-day losses correlate strongly with Google search intensity regarding the endorsement-related impact of the scandal, as well as with qualitative indicators of “endorsement-related news.” At least some sponsors' losses were competitors' gains, suggesting that endorsement deals are partially a business-stealing strategy. However, competitors who were themselves celebrity endorsement intensive fared relatively worse than those who were not endorsement intensive, and that difference also correlates day by day with news/search intensity regarding the scandal. It appears that the scandal sent a negative marketwide signal about the reputation risk associated with celebrity endorsements. This paper was accepted by Pradeep Chintagunta, marketing.