How parenting expert Dr Karp is helping new-borns to nod off by themselves

Ruth Margalit meets a doctor who has devoted his professional life to the treatment of infants, developing simple techniques to encourage them to sleep, and now a bassinette that helps new-borns to nod off by themselves.

Harvey Karp, the pediatrician, parenting expert and inventor-slash- entrepreneur, cuts an unimposing figure. Lean and agile, with wispy dark hair, blue-rimmed glasses and a bounce in his step, Karp hugs like the Angeleno he has become and deadpans like the New Yorker he once was.