Abstract In this paper, we analyze the effects on content provision in the news market of single-homing (i.e. when readers consume news from just one outlet) and multi-homing (i.e. when readers can choose to consume news from competing outlets). Media firms compete on content provision and on advertising revenues. Readers have an ideal variety of content and experience a disutility from consuming news that differs from their ideal variety. In addition, readers have a preference for single-homing and for multi-homing. In this set-up, we show that media firms only diversify content with single-homing, but not with multi-homing. The reason for this is that competition for readers and advertising is lower under multi-homing than under single-homing, since multi-homing readers consume from all media outlets. We derive the consequences of single-homing and multi-homing for profits, consumer surplus and social welfare. We also discuss the implications of our results for the current debate in the media market related with social media and echo chambers.

中文翻译：

---

单居和多居消费者在媒体市场中的内容提供

摘要在本文中，我们分析了单归属（即当读者仅从一个网点消费新闻时）和多归属（即当读者可以选择从竞争性网点消费新闻时）对新闻市场内容提供的影响。媒体公司在内容提供和广告收入上竞争。读者拥有各种理想的内容，并且对消费与理想类别不同的​​新闻感到无用。另外，读者更喜欢单归和多归。在此设置中，我们展示了媒体公司仅通过单归巢而不是多归巢使内容多样化。这样做的原因是，在多宿主环境下，针对读者和广告的竞争要比在单宿主环境下要低，因为多宿主读者会从所有媒体中消费广告。我们得出单归和多归对利润，消费者剩余和社会福利的影响。我们还将讨论我们的结果对当前与社交媒体和回声室相关的媒体市场辩论的意义。