We all know that a well-staffed sales function is vital to business success. Consider, for example, the findings of a series of studies conducted since 1988 by the sales force consultancy Chally Group. Analyzing data from more than 100,000 business decision makers, Chally discovered that 39% of B2B buyers select a vendor according to the skills of the salesperson rather than price, quality, or service features. So business schools must spend a lot of time teaching sales skills, right?

A version of this article appeared in the July–August 2012 issue of Harvard Business Review.