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Motivations
Open access (mostly green and gratis) began to be sought and provided worldwide by researchers when the possibility itself was opened by the advent of Internet and the World Wide Web. The momentum was further increased by a growing movement for academic journal publishing reform, and with it gold and libre OA.
The premises behind open access publishing are that there are viable funding models to maintain traditional peer review standards of quality while also making the following changes:Rather than making journal articles accessible through a subscription business model, all academic publications could be made free to read and published with some other cost-recovery model, such as publication charges, subsidies, or charging subscriptions only for the print edition, with the online edition gratis or "free to read".
Rather than applying traditional notions of copyright to academic publications, they could be libre or "free to build upon".An obvious advantage of open access journals is the free access to scientific papers regardless of affiliation with a subscribing library and improved access for the general public; this is especially true in developing countries. Lower costs for research in academia and industry have been claimed in the Budapest Open Access Initiative, although others have argued that OA may raise the total cost of publication, and further increase economic incentives for exploitation in academic publishing. The open access movement is motivated by the problems of social inequality caused by restricting access to academic research, which favor large and wealthy institutions with the financial means to purchase access to many journals, as well as the economic challenges and perceived unsustainability of academic publishing.Stakeholders and concerned communities
The intended audience of research articles is usually other researchers. Open access helps researchers as readers by opening up access to articles that their libraries do not subscribe to. All researchers benefit from open access as no library can afford to subscribe to every scientific journal and most can only afford a small fraction of them – this is known as the "serials crisis".Open access extends the reach of research beyond its immediate academic circle. An open access article can be read by anyone – a professional in the field, a researcher in another field, a journalist, a politician or civil servant, or an interested layperson. Indeed, a 2008 study revealed that mental health professionals are roughly twice as likely to read a relevant article if it is freely available.Inequality and open access
Gender inequality
Gender inequality still exists in the modern system of scientific publishing.
In terms of citation and authorship position, gender differences favoring men can be found in many disciplines such as political science, economics and neurology, and critical care research. For instance, in critical care research, 30.8% of the 18,483 research articles published between 2008 and 2018 were led by female authors and were more likely to be published in lower-impact journals than those led by male authors. Such disparity can adversely affect the scientific career of women and underrate their scientific impacts for promotion and funding. Open access (OA) publishing can be a tool to help female researchers increase their publications' visibility, measure impact, and help close the gendered citation gap. OA publishing is a well-advocated practice for providing better accessibility to knowledge (especially for researchers in low- and middle-income countries) as well as increasing transparency along with the publishing procedure [21,22]. Publications' visibility can be enhanced through OA publishing due to its high accessibility by removing paywalls compared to non-OA publishing.
Additionally, because of this high visibility, authors can receive more recognition for their works. 
OA publishing is also suggested to be advantageous in terms of citation number compared to non-OA publishing,  but this aspect is still controversial within the scientific community. The association between OA and a higher number of citations may be because higher-quality articles are self-selected for publication as OA. Considering the gender-based issues in academia and the efforts to improve gender equality, OA can be an important factor when female researchers choose a place to publish their articles. With a proper supporting system and funding, OA publishing is shown to have increased female researchers' productivity.
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