本文參考傳媒外部性文獻，特別是Edwin Baker 具有開創意 義的分類，並進而分為「生產的外部性」與「消費的外部性」， 據此提出分析台灣《壹週刊》內容外部性的方法。作者隨機取樣 《壹週刊》2001 至2009 年間，96 期、192 本的479 則封面新聞 為分析樣本，有21.7%屬於公領域硬新聞，私領域軟新聞則達 51.8%；在82 則屬於政治議題的封面故事，43 則側重私領域，聚 焦公領域略少（39 則）且包括誤導性訊息。《壹週刊》監督公益 的正外部性，少於其曝光私德的負外部性；政治正外部性佔全數 樣本的比例偏少，有些甚且存在新聞專業品質上的疑慮。《壹週 刊》尚有一些限制級暴力、色情等內容登上封面故事，明顯違反 《分級辦法》，比例雖不高，但可能對兒少與他人之互動產生負 外部性。

In this article, the author developed a framework for the analysis of Next Weekly’s externalities by reviewing articles for media externalities, especially Edwin Baker’s category system. In addition, we classified externalities into two types as follows: production and consumption. The author collected the cover stories of Next Weekly from 2001–2009 using random sampling, which included 96 journals, 192 volumes, and 479 pieces of news. The results showed that 21.7% of news pieces were “public sphere-hard news” and 51.8% of news pieces were “private sphere-soft news”. There were 43 out of 82 pieces focusing on political news stressed the private sphere. Other news pieces from Next Weekly were subject to content restrictions (i.e., violence and pornography). This may have influenced the reaction of teenagers and other members of the community.