Two NPR staffers are leaving public broadcasting for prominent positions with other media outlets. Lisa Chow, a reporter for NPR’s Planet Money economics unit, is heading to FiveThirtyEight, the new data-journalism website from Nate Silver. Chow will serve as senior features editor at the ESPN-owned website and host and develop a podcast, according to a series of tweets by Silver. Before joining Planet Money, Chow covered economics for New York’s WNYC and worked as an assistant editor for NPR’s Morning Edition. Also, Anna Bross, NPR’s media relations director, is leaving to become senior director of communications for The Atlantic. Bross will oversee media and public relations for the magazine, website and subsidiary sites, according to Wednesday’s press release from The Atlantic.