This page includes information on a accepted paper to be published in the journal Scientometrics. Here you have access to the full text, materials and code.

Abstract
This paper evaluates the Spanish open access (OA hereafter) mandate and its effects on Spanish research from 2014 to 2019. First, the degree of compliance with the mandate is studied. Then, classification trees and regression models are applied to determine the factors that are correlated with publishing in OA, and the implications of OA types in terms of the impact and visibility of academic articles. Results show that the compliance rate increased by 9% during the studied period, with a prevalence of gold and green OA routes. Moreover, the classification tree points towards the institutions’ nature and the research areas as the variables that better explain OA publishing. We argue that the commitment and the institutions’ policies regarding OA, and the different availability of OA journals within research fields influence the decision of publishing in OA. Last, we study how these practices affect research’s visibility and impact. We found that, in general, publishing in OA is beneficial for researchers, especially if they choose the green route. Further research at faculty or departmental level might be helpful to discern the best strategies to encourage open access publishing.

Postprint
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Open data
Data used for the analysis is openly available here

However, the table is only a compilation of four datasets. We encourage readers to refer to the direct sources:

• OpenAPC (https://openapc.net/); Matthias, 2020; Morrison, 2021; and Butler et al., 2022. However, it is restricted to the journals where results of the projects funded by the Spanish State Plan for the Generation of Knowledge and Scientific and Technological Strengthening were published.
• Butler, L.-A., Matthias, L., Simard, M.-A., Mongeon, P., & Haustein, S. (2022). Annual Article Processing Charges (APCs) and number of gold and hybrid open access articles in Web of Science indexed journals published by Elsevier, Sage, Springer-Nature, Taylor & Francis and Wiley 2015-2018 (Versión v1) [Data set]. Zenodo. https://doi.org/10.5281/zenodo.7086420
• Lisa Matthias. (2020). Publisher OA Portfolios 2.0 (2.0) [Data set]. Zenodo. https://doi.org/10.5281/zenodo.3841568
• Morrison, Heather et al., 2021, “2011 - 2021 OA APCs”, https://doi.org/10.5683/SP2/84PNSG, Borealis, V1