Actually, my point is that the academic consensus is that piracy causes harm, although there are studies holding either way on the issue.
The review, The Economics of Music File Sharing – A Literature Overview, by Peter Tschmuck (Microsoft Word version here), examines 22 studies which look at the effects of filesharing on the music industry. Because some are skeptical of industry generated studies, it should be pointed out that all the studies here are independent, academic studies — working papers, academic journal articles, and dissertations. Of these 22 studies, 14 — roughly two-thirds — conclude that unauthorized downloads have a “negative or even highly negative impact” on recorded music sales.2
Studies since Tschmuck’s only confirm these findings. One notable contribution is economist Stan Liebowitz’s study The Metric is the Message: How Much of the Decline in Sound Recording Sales is Due to File-Sharing? released in November 2011. In it, Liebowitz translates the conclusions of existing studies on the effects of unauthorized downloads on recorded music sales into a common metric to answer the question posed in his title.
His conclusion is stunning: “file-sharing has caused the entire decline in sound recording sales that has occurred since the ascendance of Napster.”