RT Journal Article SR Electronic T1 In Defence of the Hierarchy of Effects JF Journal of Advertising Research JO J Advert Res FD WARC SP 44 OP 47 DO 10.2501/JAR-42-3-44-47 VO 42 IS 3 A1 Barry, Thomas E. YR 2002 UL http://www.journalofadvertisingresearch.com/content/42/3/44.abstract AB Thomas E. Barry feels that rather than discard the hierarchy of effects model, we should develop rigorous, collaborative efforts to validate its continued value to guide us in advertising and marketing communications planning for another 100 years.