Better Sharing Through Licenses? Measuring the Influence of Creative Commons Licenses on the Usage of Open Access Monographs

摘要

INTRODUCTION Open Access and licenses are closely intertwined. Both Creative Commons (CC) and Open Access seek to restore the balance between the owners of creative works and prospective users. Apart from the legal issues around CC licenses, we could look at role of intermediaries whose work is enabled through CC licenses. Does licensing documents under Creative Commons increase access and reuse in a direct way, or is access and reuse amplified by intermediaries? OAPEN LIBRARY AND DOAB The OAPEN Library contains books available under both open licenses, for example Creative Commons, as well as books that are published under terms that only allow for personal use. The Directory of Open Access Books (DOAB) functions as an intermediary, offering aggregation services exclusively focused on books with an open license. METHODS Downloads are used as a proxy for the use of books in the OAPEN Library. The data set that this paper analyses data that was captured over a period of 33 months. During this time, 1734 different books were made available through the OAPEN Library: 855 books under a Creative Commons license and 879 books under a more restrictive regime. The influence of open licenses, aggregation in DOAB, and subject and language are evaluated. RESULTS Once the effects of subject and language are taken into account, there is no evidence that making books available under open licenses results in more downloads than making books available under licenses that only allow for personal use. Yet, additional aggregation in the DOAB has a large positive effect on the number of times a book is downloaded. CONCLUSION The application of open licenses to books does not, on its own, lead to more downloads. However, open licenses pave the way for intermediaries to offer new discovery and aggregation services. These services play an important role by amplifying the impacts of open access licensing in the case of scholarly books.