BusinessWeek - Aspiring attorneys learn early in law school that a civil suit pits a plaintiff claiming injury against a defendant alleged to have caused a specific harm. It sounds simple. In the real world, litigation can get a lot more complicated. That's evident in the mammoth gender discrimination suit filed against Wal-Mart Stores by women who claim that local store managers made sexist decisions about promotions and pay and that company executives failed to stop them. ...

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