Target shoppers Kelly Foley (from left), Debbie Winslow and Ann Rich use a smartphone to look at a competitor's prices while shopping shortly after midnight on Black Friday, in South Portland, Maine. Robert F. Bukaty/AP hide caption

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Job hunters line up for interviews at an employment fair in New York City. The unemployment rate tells only a partial story about the U.S. labor market. Mark Lennihan/AP hide caption

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A notice in a store window in New York City announces a retail job opening. Now that unemployment has slipped below 6 percent, there's renewed interest in what the Federal Reserve's target for joblessness should be. Spencer Platt/Getty Images hide caption

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Sign of the times? A "help wanted" sign in the window of a Philadelphia business last year. Matt Rourke/AP hide caption

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Looking for work in Florida. At a November career fair in West Palm Beach, this man had a job application in hand. Joe Raedle/Getty Images hide caption

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People looking for work were filling out applications earlier this month at a career fair in Emeryville, Calif. Justin Sullivan/Getty Images hide caption

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The scene earlier this month at a job fair in Sunrise, Fla. Joe Raedle/Getty Images hide caption

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A recruiter for Cigna greets a job seeker at a career fair in Philadelphia over the summer. Mark Makela /Reuters /Landov hide caption

itoggle caption Mark Makela /Reuters /Landov

Looking for work: The scene at a job fair in New York City earlier this year. Figures on job growth and unemployment in April are due Friday morning. Shannon Stapleton /Reuters /Landov hide caption

itoggle caption Shannon Stapleton /Reuters /Landov

Li-Wen Hung (left) and Whitney Chen were waiting to meet potential employers at a Manhattan job fair earlier this year. Mario Tama/Getty Images hide caption

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