The advertising agencies and the media can argue the point either way. If they are trying to convince an advertiser to increase the media budget, they can cite examples of devastatingly successful advertising campaigns. But if they are defending themselves before the Federal Trade Commission (FTC) or a civic organization decrying television advertising to children, they trot out the data that demonstrate that advertising has slight or no effect on product sales.

Advertising, The Uneasy Persuasion: Its Dubious Impact on American Society, 1984