In a memo to staff, Walker said that “the Board and I have agreed that the time has come for me to move on.” (Her contract was due to expire in June; she steps down at the end of March.) Over 23 years, Walker presided over extraordinary growth at WNYC, the US’s largest public radio outlet, but a series of scandals and controversies over the past year led to more general criticism of her management style and extremely high pay. — Current