What do the Papers Sell? a Model of Advertising and Media Bias
建立了一个报纸向读者卖新闻、向广告商卖版面的双边市场模型，分析广告如何影响新闻偏向，并解释历史上和近期媒体商业偏向的差异。
We model the market for news as a two-sided market where newspapers sell news to readers who value accuracy and sell space to advertisers who value advert-receptive readers. In this setting, monopolistic newspapers under-report or bias news that sufficiently reduces advertiser profits. Paradoxically, increasing the size of advertising eventually leads competing newspapers to reduce advertiser bias. Nonetheless, advertisers can counter this effect if able to commit to news-sensitive cut-off strategies, potentially inducing as much bias as in the monopoly case. We use these results to explain contrasting historical and recent evidence on commercial bias and influence in the media.