RT Journal Article SR Electronic T1 Pitfalls and Fraud In Online Advertising Metrics JF Journal of Advertising Research JO J Advert Res FD WARC SP 127 OP 132 DO 10.2501/JAR-54-2-127-132 VO 54 IS 2 A1 Benjamin Edelman YR 2014 UL http://www.journalofadvertisingresearch.com/content/54/2/127.abstract AB How does online advertising become less effective than advertisers expect and less effective than measurements indicate? The current research explores problems that result, in part, from malfeasance by outside perpetrators who overstate their efforts to increase their measured performance. In parallel, similar vulnerabilities result from mistaken analysis of cause and effect—errors that have become more fundamental as advertisers target their advertisements with greater precision. In the paper that follows, the author attempts to identify the circumstances that make advertisers most vulnerable, notes adjusted contract structures that offer some protections, and explores the origins of the problems in participants' incentives and in legal rules.