Corporate longevity fascinates Vicki TenHaken, professor of management, who spent much of her sabbatical writing a book about why America’s 100-plus year-old companies have endured wars, recessions, a Great Depression, and an ever-fickle U.S. marketplace. It’s a topic of inquiry that she can trace back to two sources: her first career and 25 years spent in corporate leadership and her second career teaching management principles at Hope College.