Long before Amy Chua’s provocative 2011 memoir, Battle Hymn of the Tiger Mother, raised the bar for tough-love parenting, psychologists at UC Berkeley were studying the effects of three kinds of child-rearing: authoritarian (too hard), permissive (too soft) and authoritative (combo). Now, with the recent release of Berkeley alumna Kim Wong Keltner’s memoir, Tiger Babies Strike Back, along with other scholarly works and testimonials, the results are in.