RT Journal Article SR Electronic T1 How Limited Data Access Constrains Marketing-Mix Analytical Efforts JF Journal of Advertising Research JO J Advert Res FD WARC SP 390 OP 393 DO 10.2501/JAR-2018-046 VO 58 IS 4 A1 Gian M. Fulgoni YR 2018 UL http://www.journalofadvertisingresearch.com/content/58/4/390.abstract AB