Earlier work found that male stock traders made more money on days when their level of the male hormone testosterone was higher.
VOA: special.2009.02.25
On one level, there are things like companies that have two . different classes of stock that are economically identical.
一方面,我们有这样的例子,有的公司拥有两种,不同类别的股票,他们在经济意义上是相同的。
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