• Newspapers and advertising : the effects of ad-valorem taxation under duopoly 

      Kind, Hans Jarle; Schjelderup, Guttorm; Stähler, Frank (Discussion paper, Working paper, 2006-12)
      Newspapers are two-sided platforms that sell their product both to readers and advertisers. Media firms in general, and newspapers in particular, are considered important providers of information, culture and language ...