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Between January 1997 and June 2002, approximately 10% of all listed companies in the United States announced at least one financial statement restatement. The stock prices of restating companies declined 10% on average on the announcement of these restatements, with restating firms losing over $100 billion in market capitalization over a short three day trading window surrounding these restatements. Such generalized financial irregularity requires a more generic causal explanation than can be found in the facts of Enron, WorldCom or other specific case histories.
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John C. Coffee (2003) studied this question.