This research investigates the role of fit between campaign ads in generating cross-media effects. Using an ecologically valid design, this article enhances our understanding of cross-media effects in real life. By combining a content analysis of Dutch cross-media campaigns with a secondary data analysis of tracking studies on the same campaigns (n D 900), this research revealed that fit contributed positively to campaign evaluations yet contributed negatively to brand and campaign memory. In conclusion, this research shows that fit is an important factor in understanding cross-media synergy but might have both positive and negative effects.

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