Economists use the phrase "full employment" to mean the number of people seeking jobs is roughly in balance with the number of openings. heshphoto/Getty Images/Image Source hide caption

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Japan's Prime Minister Shinzo Abe plays with children as he inspects a day care center in Yokohama in 2013. More than 20,000 Japanese children are on wait lists for day care. Kyodo/Reuters/Landov hide caption

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Ellsworth Ashman lost his middle-skill job at Entenmann's on Long Island, N.Y., last year. Now he's working at a job that pays half of what he made at the bakery. Charles Lane/WSHU hide caption

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José Moncada, 16, signed up for a summer youth employment program in New York City. He said hopes to earn enough to help his family, which lives on less than $30,000 a year. Kaomi Goetz for NPR hide caption

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In the face-to-face interview process, research shows that managers tend to hire applicants who are similar to them on paper. Bjorn Rune Lie/Getty Images/Ikon Images hide caption

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With the technology to conduct more nuanced tests, some companies say they can provide more useful detail about how people think in dynamic situations. Marcus Butt/Getty Images/Ikon Images hide caption

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Measles vaccine isn't a part of most workplaces. Eric Risberg/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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