OLLIE is in many ways a typical dog. She likes going for walks and chasing birds, and is especially fond of having her tummy rubbed. But in one respect, the Staffordshire Terrier differs radically from her canine peers: she has a burgeoning academic career, and sits on the editorial boards of seven medical journals. As you may have guessed, the journals on whose boards Ollie sits are of the predatory variety. These are shadowy, online publications that mimic legitimate journals, but are prepared to publish anything in exchange for a fee that can run into thousands of dollars. Predatory journals...