有同学能不能帮我下载下面三篇论文,我们学校万方数据库里面有,每篇论文给十个论坛币吧
stock return variances:the arrival of information and the reaction of traders
by French an Roll journal of Financial Economics
A theory of common stock returns over trading and non-trading periodsOldfield,G, and R.rogalski
journal of finance
a theory of intraday patterns:volume and price variability
by Admati and Pfleiderer review of financial studies


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