As one of three co-teachers of a Stanford Graduate School of Business course on the rapidly growing importance of older consumers and workers, Rob Chess likes to say that his colleague Laura Carstensen, the founding director of the Stanford Center on Longevity, is the expert on aging; his fellow lecturer in management, Susan Wilner Golden, has the entrepreneurial angle covered; and he represents the demographic in question. "I just got my Medicare card," he says with a chuckle.