The Wallet Allocation Rule is 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 landmark 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.

Companies currently spend billions of dollars each year measuring and...