Posts Tagged ‘event study’

Environmental Disclosure: Newsweek’s Green Rankings

August 23, 2012

What does it mean to be green? Ahead of this October’s fourth annual corporate environmental scores, Thomas P. Lyon of the University of Michigan and Jay P. Shimshack of Tulane University investigate in “Environmental Disclosure: Evidence From Newsweek’s Green Companies Rankings,” published on August 13, 2012 in Business & Society. The abstract:

Corporate-level environmental information disclosure is increasingly common. This article studies the impact of a prominent media-generated sustainability ratings program, Newsweek’s 2009 ranking of the 500 largest U.S. firms. Using an event study methodology, the authors find the rankings had a significant impact on shareholder value. Firms in the top 100 experienced abnormal returns after the information release that were 0.6%–1.0% higher than returns of firms in the bottom 400. The form of the information released had significant effects as well. Nuanced environmental score variables had no independent impact on market outcomes; only the final ranking mattered. This article also explores possible channels through which the rankings may have had their impact. The authors find suggestive evidence that private and public politics mechanisms were the most important.

Click here to read the article in Business & Society and here to learn more about the journal.

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Security Breach: How Managers Should Respond

June 24, 2012

After hackers stole millions of LinkedIn passwords this month, resulting in a $5 million class-action lawsuit, the social networking site’s response to its customers reportedly left much to be desired. If managers were to look at such data leaks as more than just system failures, could they respond more quickly and effectively?

Arvind Malhotra and Claudia Kubowicz Malhotra, both of Kenan-Flagler Business School, University of North Carolina at Chapel Hill, published “Evaluating Customer Information Breaches as Service Failures: An Event Study Approach” in the February 2011 issue of the Journal of Service Research. To see the latest articles from the journal, click here.

The abstract:

Firms are collecting more information about their customers than ever before in an attempt to understand and better serve customer needs. At the same time, firms are becoming more vulnerable to the compromise of customer information through security breaches. This study attempts to associate breach reports with the decline in market value of firms using an event study. The results show that firms suffer significant market value depreciation over a short as well as a long time window. Further, the greatest devaluation occurs when larger amounts of customer information are compromised at large companies. Due to the greater potential of customer backlash, negative publicity and liability risk, managers must view customer information breaches as service failures rather than as information system failures. Employing established service failure recovery strategies may allow firms to quickly and proactively address customer privacy concerns and thereby mitigate negative market reaction to information breaches.

To learn more about the Journal of Service Research, please follow this link. To receive email alerts about newly published articles, click here.


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