RT Journal Article SR Electronic T1 Is Once Really Enough? Making Generalizations about Advertising's Convex Sales Response Function JF Journal of Advertising Research JO J Advert Res FD WARC SP 198 OP 200 DO 10.2501/S002184990909028X VO 49 IS 2 A1 Jennifer Taylor A1 Rachel Kennedy A1 Byron Sharp YR 2009 UL http://www.journalofadvertisingresearch.com/content/49/2/198.abstract AB This article examines the generalizability of convex-shaped advertising response functions. Using single-source data, we analyzed the response functions of brands in four consumer goods categories. This study supports the prior finding that convex response functions are typical, but not universal. While the convex response function is found to apply across a range of conditions, more work is needed to understand measurement issues, exceptions, and boundary conditions.