Chris Zook is co-head of the Global Strategy Practice at Bain & Company. He is co-author, with James Allen, of the upcoming book: Repeatability: Build Enduring Businesses for a World of Constant Change (HBR Press, March 2012). He is the author of Profit from the Core and an author and co-author of numerous other books and HBR articles, including The Great Repeatable Business Model, published in HBR in November 2011.