"A must-read for anyone who wants to understand why they behave as they do." --Art Markman, Ph.D., author of Smart Thinking Do you play to win? Or do you play not to lose? As Tory Higgins and Heidi Grant Halvorson have discovered in their work at Columbia University's Motivation Science Center, everything we do is motivated either by a desire to be better off or to simply hang on to what we've got. And understanding the simple but crucial difference...