Full Terms & Conditions of access and use can be found at https://www.tandfonline.com/action/journalInformation?journalCode=rina20 International Journal of Advertising The Review of Marketing Communications ISSN: 0265-0487 (Print) 1759-3948 (Online) Journal homepage: https://www.tandfonline.com/loi/rina20 eWOM across channels: comparing the impact of self-enhancement, positivity bias and vengeance on Facebook and Twitter Chris Vargo, Harsha Gangadharbatla & Toby Hopp To cite this article: Chris Vargo, Harsha Gangadharbatla & Toby Hopp (2019) eWOM across channels: comparing the impact of self-enhancement, positivity bias and vengeance on Facebook and Twitter, International Journal of Advertising, 38:8, 1153-1172, DOI: 10.1080/02650487.2019.1593720 To link to this article: https://doi.org/10.1080/02650487.2019.1593720 Published online: 23 Apr 2019. Submit your article to this journal Article views: 348 View related articles View Crossmark data Citing articles: 1 View citing articles