scholarly journals The Future of OA: A large-scale analysis projecting Open Access publication and readership

2019 ◽  
Author(s):  
Heather Piwowar ◽  
Jason Priem ◽  
Richard Orr

SummaryUnderstanding the growth of open access (OA) is important for deciding funder policy, subscription allocation, and infrastructure planning.This study analyses the number of papers available as OA over time. The models includes both OA embargo data and the relative growth rates of different OA types over time, based on the OA status of 70 million journal articles published between 1950 and 2019.The study also looks at article usage data, analyzing the proportion of views to OA articles vs views to articles which are closed access. Signal processing techniques are used to model how these viewership patterns change over time. Viewership data is based on 2.8 million uses of the Unpaywall browser extension in July 2019.We found that Green, Gold, and Hybrid papers receive more views than their Closed or Bronze counterparts, particularly Green papers made available within a year of publication. We also found that the proportion of Green, Gold, and Hybrid articles is growing most quickly.In 2019: 31% of all journal articles are available as OA52% of article views are to OA articlesGiven existing trends, we estimate that by 2025: 44% of all journal articles will be available as OA70% of article views will be to OA articlesThe declining relevance of closed access articles is likely to change the landscape of scholarly communication in the years to come. Percent of views, by OA type: Percent of papers, by OA type:

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e4375 ◽  
Author(s):  
Heather Piwowar ◽  
Jason Priem ◽  
Vincent Larivière ◽  
Juan Pablo Alperin ◽  
Lisa Matthias ◽  
...  

Despite growing interest in Open Access (OA) to scholarly literature, there is an unmet need for large-scale, up-to-date, and reproducible studies assessing the prevalence and characteristics of OA. We address this need using oaDOI, an open online service that determines OA status for 67 million articles. We use three samples, each of 100,000 articles, to investigate OA in three populations: (1) all journal articles assigned a Crossref DOI, (2) recent journal articles indexed in Web of Science, and (3) articles viewed by users of Unpaywall, an open-source browser extension that lets users find OA articles using oaDOI. We estimate that at least 28% of the scholarly literature is OA (19M in total) and that this proportion is growing, driven particularly by growth in Gold and Hybrid. The most recent year analyzed (2015) also has the highest percentage of OA (45%). Because of this growth, and the fact that readers disproportionately access newer articles, we find that Unpaywall users encounter OA quite frequently: 47% of articles they view are OA. Notably, the most common mechanism for OA is not Gold, Green, or Hybrid OA, but rather an under-discussed category we dub Bronze: articles made free-to-read on the publisher website, without an explicit Open license. We also examine the citation impact of OA articles, corroborating the so-called open-access citation advantage: accounting for age and discipline, OA articles receive 18% more citations than average, an effect driven primarily by Green and Hybrid OA. We encourage further research using the free oaDOI service, as a way to inform OA policy and practice.


2020 ◽  
Vol 2 (4) ◽  
pp. 228-247 ◽  
Author(s):  
H. Piwowar ◽  
J. Priem ◽  
V. Larivière ◽  
J. P. Alperin ◽  
L. Matthias ◽  
...  

Despite growing interest in Open Access (OA) to scholarly literature, there is an unmet need for large-scale, up-to-date, and reproducible studies assessing the prevalence and characteristics of OA. We address this need using oaDOI, an open online service that determines OA status for 67 million articles. We use three samples, each of 100,000 articles, to investigate OA in three populations: (1) all journal articles assigned a Crossref DOI, (2) recent journal articles indexed in Web of Science, and (3) articles viewed by users of Unpaywall, an open-source browser extension that lets users find OA articles using oaDOI. We estimate that at least 28% of the scholarly literature is OA (19M in total) and that this proportion is growing, driven particularly by growth in Gold and Hybrid. The most recent year analyzed (2015) also has the highest percentage of OA (45%). Because of this growth, and the fact that readers disproportionately access newer articles, we find that Unpaywall users encounter OA quite frequently: 47% of articles they view are OA. Notably, the most common mechanism for OA is not Gold, Green, or Hybrid OA, but rather an under-discussed category we dub Bronze: articles made free-to-read on the publisher website, without an explicit Open license. We also examine the citation impact of OA articles, corroborating the so-called open-access citation advantage: accounting for age and discipline, OA articles receive 18% more citations than average, an effect driven primarily by Green and Hybrid OA. We encourage further research using the free oaDOI service, as a way to inform OA policy and practice.


Author(s):  
Heather Piwowar ◽  
Jason Priem ◽  
Vincent Larivière ◽  
Juan Pablo Alperin ◽  
Lisa Matthias ◽  
...  

Despite growing interest in Open Access (OA) to scholarly literature, there is an unmet need for large-scale, up-to-date, and reproducible studies assessing the prevalence and characteristics of OA. We address this need using oaDOI, an open online service that determines OA status for 67 million articles. We use three samples, each of 100,000 articles, to investigate OA in three populations: 1) all journal articles assigned a Crossref DOI, 2) recent journal articles indexed in Web of Science, and 3) articles viewed by users of Unpaywall, an open-source browser extension that lets users find OA articles using oaDOI. We estimate that at least 28% of the scholarly literature is OA (19M in total) and that this proportion is growing, driven particularly by growth in Gold and Hybrid. The most recent year analyzed (2015) also has the highest percentage of OA (45%). Because of this growth, and the fact that readers disproportionately access newer articles, we find that Unpaywall users encounter OA quite frequently: 47% of articles they view are OA. Notably, the most common mechanism for OA is not Gold, Green, or Hybrid OA, but rather an under-discussed category we dub Bronze: articles made free-to-read on the publisher website, without an explicit Open license. We also examine the citation impact of OA articles, corroborating the so-called open-access citation advantage: accounting for age and discipline, OA articles receive 18% more citations than average, an effect driven primarily by Green and Hybrid OA. We encourage further research using the free oaDOI service, as a way to inform OA policy and practice.


Author(s):  
Heather Piwowar ◽  
Jason Priem ◽  
Vincent Larivière ◽  
Juan Pablo Alperin ◽  
Lisa Matthias ◽  
...  

Despite growing interest in Open Access (OA) to scholarly literature, there is an unmet need for large-scale, up-to-date, and reproducible studies assessing the prevalence and characteristics of OA. We address this need using oaDOI, an open online service that determines OA status for 67 million articles. We use three samples, each of 100,000 articles, to investigate OA in three populations: 1) all journal articles assigned a Crossref DOI, 2) recent journal articles indexed in Web of Science, and 3) articles viewed by users of Unpaywall, an open-source browser extension that lets users find OA articles using oaDOI. We estimate that at least 28% of the scholarly literature is OA (19M in total) and that this proportion is growing, driven particularly by growth in Gold and Hybrid. The most recent year analyzed (2015) also has the highest percentage of OA (45%). Because of this growth, and the fact that readers disproportionately access newer articles, we find that Unpaywall users encounter OA quite frequently: 47% of articles they view are OA. Notably, the most common mechanism for OA is not Gold, Green, or Hybrid OA, but rather an under-discussed category we dub Bronze: articles made free-to-read on the publisher website, without an explicit Open license. We also examine the citation impact of OA articles, corroborating the so-called open-access citation advantage: accounting for age and discipline, OA articles receive 18% more citations than average, an effect driven primarily by Green and Hybrid OA. We encourage further research using the free oaDOI service, as a way to inform OA policy and practice.


2021 ◽  
Author(s):  
Daniel T. Corp ◽  
Hannah G. K. Bereznicki ◽  
Gillian M. Clark ◽  
George J. Youssef ◽  
Peter J. Fried ◽  
...  

AbstractObjectiveInterindividual variability of single and paired-pulse TMS data has limited the clinical and experimental applicability of these methods. This study brought together over 60 TMS researchers to create the largest known sample of individual participant single and paired-pulse TMS data to date, enabling a more comprehensive evaluation of factors driving response variability.Methods118 corresponding authors provided deidentified individual TMS data. Mixed-effects regression investigated a range of individual and study level variables for their contribution to variability in response to single and pp TMS data.Results687 healthy participant’s TMS data was pooled across 35 studies. Target muscle, pulse waveform, neuronavigation use, and TMS machine significantly predicted an individual’s single pulse TMS amplitude. Baseline MEP amplitude, M1 hemisphere, and biphasic AMT significantly predicted SICI response. Baseline MEP amplitude, test stimulus intensity, interstimulus interval, monophasic RMT, monophasic AMT, and biphasic RMT significantly predicted ICF response. Age, M1 hemisphere, and TMS machine significantly predicted motor threshold.ConclusionsThis large-scale analysis has identified a number of factors influencing participants’ responses to single and paired pulse TMS. We provide specific recommendations to increase the standardisation of TMS methods within and across laboratories, thereby minimising interindividual variability in single and pp TMS data.Highlights687 healthy participant’s TMS data was pooled across 35 studiesSignificant relationships between age and resting motor thresholdSignificant relationships between baseline MEP amplitude and SICI/ICF


2018 ◽  
Vol 13 (4) ◽  
pp. 99-101
Author(s):  
Jessica Koos

A Review of: Hampson, C., & Stregger, E. (2017). Measuring cost per use of library-funded open access article processing charges: Examination and implications of one method. Journal of Librarianship & Scholarly Communication, 5(1), eP2182. https://doi.org/10.7710/2162-3309.2182 Abstract Objective – To determine the feasibility and potential effects of a cost-per-use analysis of library funds dedicated to open access. Design – Cost-per-use analysis, case study. Setting – PLOS and BioMed Central. Subjects – 591 articles published in PLOS ONE, 165 articles published in PLOS Biology, and 17 articles published in BioMed Central. Methods – Three specific examples are provided of how academic libraries can employ a cost-per-use analysis in order to determine the impact of library-based open access (OA) funds. This method is modeled after the traditional cost-per-use method of analyzing a library collection, and facilitates comparison to other non-OA items. The first example consisted of using a formula dividing the total library-funded article processing charges (APCs) by the total global use of the specific PLOS journal articles that were funded. The second and third examples demonstrated what a library-funded OA membership to BioMed Central would cost alone, and then with APCs that cost could be divided by the total usage of the funded articles to determine cost-per-use. Main Results – The authors found both of the examples described in the article to be potential ways of determining cost-per-use of OA articles, with some limitations. For instance, counting article usage through the publisher’s website may not capture the true usage of an article, as it does not take altmetrics into consideration. In addition, article-level data is not always readily available. In addition, the cost-per-use of OA articles was found to be very low, ranging from $0.01 to $1.51 after the first three years of publication based on the cost of library-funded APCs. The second and third methods revealed a cost-per-use of $0.10 using membership-only payments, while using the cost of membership plus APCs resulted in a cost-per-use of $0.41. Conclusion – Libraries may wish to consider using these methods for demonstrating the value of OA funds in terms of return on investment, as these techniques allow for direct comparison to the usage of traditional journals. However, several barriers need to be overcome in how article-level usage is obtained in order for these methods to be more accurate and efficient. In addition, while the authors report that "The specific examples in this study suggest that OA APCs may compare favorably to traditional publishing when considering value for money based on cost per use," they also caution that the study was not designed to answer the question if the ROI is greater for OA publications than for traditional articles, stating that "...the data in this study should not be interpreted as a verification of such an argument, as this study was not designed to answer that question, nor can it do so given the limitations on the data. This paper was designed to present and illustrate a method. Further study would be necessary to verify or refute this possibility" (p. 15).


NeuroImage ◽  
2017 ◽  
Vol 144 ◽  
pp. 113-127 ◽  
Author(s):  
Christopher G. Schwarz ◽  
Matthew L. Senjem ◽  
Jeffrey L. Gunter ◽  
Nirubol Tosakulwong ◽  
Stephen D. Weigand ◽  
...  

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