Economics and Usage of Digital Libraries: Byting the BulletSkip other details (including permanent urls, DOI, citation information)
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11. We limited our scope to what we call "unique accesses," counting multiple accesses to a given article by a single individual during a PEAK session as only one access. For anonymous access (i.e., access by users not enetering a password), we define a "unique" access as any number of accesses to an article within 30 minutes from a particular IP address. For authenticated users, we define a "unique" access as any number of accesses to an article by an authenticated user within 30 minutes of the first access.
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