With corporate managers under enormous pressure to control costs and maintain liquidity in the current credit crisis, advertising budgets often appear to be a dispensable luxury in the struggle to survive. Executives who succumb to that temptation, however, put the long-term future of their companies at risk, according to Wharton faculty and advertising experts.

“The first reaction is to cut, cut, cut, and advertising is one of the first things to go,” says Wharton marketing professor Peter Fader , adding that as companies slash advertising in a downturn, they leave empty space in consumers’ minds for aggressive marketers to make strong inroads.…