"A revolutionary, definitive guide for winning the battle for share of customers' hearts, minds, and wallets. Backed by rock-solid science published in the Harvard Business Review and MIT Sloan Management Review, this book introduces a new and rigorously tested approach--the Wallet Allocation Rule--that is proven to link to the most important measure of customer loyalty: share of wallet. Managers finally have the missing link to business growth within their grasp--the ability to link their existing metrics to the share of spending that customers allocate to their brands."--