However, the domestic theoretical research focused on mandatory information disclosure, and the voluntary disclosure of information is not enough.

但国内的理论研究主要集中在强制性信息披露，而对自愿性信息披露的研究很少。

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Voluntary information disclosure, as a complementary and supplementary means of mandatory information disclosure, can improve the reliability and completeness of information.

自愿信息披露作为强制信息披露的补充和辅助，可提高所披露信息的真实性和全面性。

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The amount of insider information disclosure cost was studied on conditions of voluntary disclosure and mandatory disclosure.

分别在自愿信息披露和强制信息披露的情况下，研究了公司内部人的信息披露成本；

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The brokerage industry is unique in that it has been permitted to self-regulate with limited SEC oversight, self-insure through the Securities Investor Protection Corporation, self-adjudicate through mandatory NASD Dispute Resolution arbitration, and even control, through the NASD Public Disclosure Program, the information the public receives about firms.

FORBES: Investigating Brokerages (May 1, 2002 )