Heald, P., Erickson, K. and Kretschmer, M. (2015) The valuation of unprotected works: a case study of public domain photographs on Wikipedia. Harvard Journal of Law and Technology, 29(1), pp. 1-32.
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Publisher's URL: http://jolt.law.harvard.edu/articles/pdf/v29/29HarvJLTech1.pdf
Abstract
What is the value of works in the public domain? We study the biographical Wikipedia pages of a large data set of authors, composers, and lyricists to determine whether the public domain status of available images leads to a higher rate of inclusion of illustrated supplementary material and whether such inclusion increases visitorship to individual pages. We attempt to objectively place a value on the body of public domain photographs and illustrations which are used in this global resource. We find that the most historically remote subjects are more likely to have images on their web pages because their biographical life-spans pre-date the existence of in-copyright imagery. We find that the large majority of photos and illustrations used on subject pages were obtained from the public domain, and we estimate their value in terms of costs saved to Wikipedia page builders and in terms of increased traffic corresponding to the inclusion of an image. Then, extrapolating from the characteristics of a random sample of a further 300 Wikipedia pages, we estimate a total value of public domain photographs on Wikipedia of between $246 to $270 million dollars per year.
| Item Type: | Articles |
|---|---|
| Keywords: | Wikipedia, public domain, copyright, Creative Commons, peer production, valuation, photography, digital images |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Erickson, Professor Kristofer and Kretschmer, Professor Martin |
| Authors: | Heald, P., Erickson, K., and Kretschmer, M. |
| Subjects: | H Social Sciences > HB Economic Theory K Law > K Law (General) |
| College/School: | College of Social Sciences > School of Law |
| Journal Name: | Harvard Journal of Law and Technology |
| Publisher: | Harvard Law School |
| ISSN: | 0897-3393 |
| ISSN (Online): | 2153-263X |
| Copyright Holders: | Copyright © 2015 Harvard Law School |
| First Published: | First published in Harvard Journal of Law and Technology 29(1):1-32 |
| Publisher Policy: | Reproduced in accordance with the copyright policy of the publisher |
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