Second, each firm's common stock had to be listed on the NY or American Stock Exchange in order to assure the availability of security return information. 第二，每一间公司的普通股，必须要在纽约或是美国证交所上市， 这是为了确保证券报酬率资讯的取得性。 Third, the security return data had to be available on the CRSP tape for the 57 weeks prior to the week of the disclosure of the auditor change and 10 weeks after the disclosure. 第三，证券报酬率资料必须要在CRSP磁带上是可以拿的到的， 且是要在公布审查员变动前的57周，及公布後的10周。 Fourth, the firm could not have merged within one year of the announcement date 第四，企业不能在公布後一年内有购并情况。 Fifth, the change in auditors had to involve the firm's principal auditor rather than an auditor of a subsidiary. 第五，审查员的更换必须要包含企业的主要审查员，而不是子公司的审查员。 Finally, earnings or other significant events could not have been reported in the Wall Street Journal during the announcement week. 最後，获利或是其他重要的事件，不能够是在公告周、华尔街日报上有报导的。 红色是试译，请问有重大误述吗？ 不求润句，只想知道理解上有没有错误就好，谢谢。

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