In a statement to Gillette's shareholders,its CEOindicated, "Despite several new product launches, Gillette's advertising-to-sales declined dramatically . . . to 8 percent last year. Gillette's advertising spending, in fact, is one of the lowest in our peer group of consumer product companies."

If the elasticity of demand for Gillette's consumer products is similar to other firms in its peer group (which averages -3.5), what is Gillette's advertising elasticity?