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To help with arxiv's support and governance, the membership program aims to engage libraries and research laboratories worldwide that represent arXiv's heaviest institutional users. Each member institution pledges a five-year initial funding commitment to support arXiv. arXiv's sustainability plan is founded on arXiv's operating principles and presents a business model for generating revenues. Cornell University Library (CUL), the Simons Foundation, and a global collective of institutional members support arXiv financially. The financial model for 2013-2017 entails three sources of revenues:
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