It’s something that’s started to get on peoples’ nerves in pop culture: Hollywood seems totally open to older male actors, but aside from the Helen Mirrens of the world, leading women seem to age out at about 30. Well, it looks as if the same dynamic is at play in the broader working world, as well. A new working paper out from the National Bureau of Economic Research, based on what is probably the largest field experiment to date testing the prevalence of age discrimination in hiring, shows that the résumés of older women get far fewer callbacks than those of older men and of younger applicants of either sex.

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