President Barack Obama’s Labor Day executive order will provide seven days of sick leave to employees of federal contractors, good news for some 300,000 American workers. Now the president wants Congress to approve legislation extending that benefit to the private sector.

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The Institute for Women’s Policy Research conducted a study in San Francisco after that city adopted a paid sick leave law.

“Only about 14 percent of employers saw a negative impact on profitability,” says Jessica Milli, study director for IWPR.