With the rise of social media and streaming platforms, firms and brand-owners increasingly depend on influencers to attract consumers, who care about both common product quality and consumer-influencer interaction. Sellers thus compete in both influencer and product markets. As outreach and...

Editor's preface / Gabriele Siegert, M. Bjørn von Rimscha, and Stephanie Grubenmann -- Information and disinformation about advertising / Kati Förster and Ulli Weish -- Information and disinformation through advertising / Roland Mangold -- Information about users / Andrew McStay -- Inclusion...