Stereotypes that peg older workers as low-productivity employees who are stuck in their ways remain infuriatingly durable. “One thing that always strikes me is social attitudes,” says David Neumark, economist and director of the Center for Economics & Public Policy at the University of California, Irvine. “People who would never make a racist or sexist joke will make an ageist joke without thinking about it. The social acceptability of that is remarkable.”

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