Costco Women’s Bias Suit May Be Imperiled by Wal-Mart Decision

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Costco Wholesale Corp. may be able to block women accusing it of gender bias from suing as a group because of the U.S. Supreme Court’s decision in a discrimination suit against Wal-Mart Stores Inc.

The women sued Costco in 2004, accusing the largest U.S. warehouse-club chain of limiting promotions of female employees to assistant general manager and general manager by failing to post such job openings. They won the right to sue as a group in a class action in 2007. Costco’s appeal of that order was put on hold while the Supreme Court considered Dukes v. Wal-Mart.