This nascent field of research is highly interdisciplinary, sitting at the intersection of computer science, cryptography, economics, engineering, finance, law, mathematics, and politics. Due to its novelty and wide-ranging nature, cryptocurrency studies have not sat comfortably in any traditional journal, and it is thus our aim to create the first purpose-built vehicle for the leading research in the field. We welcome papers of up to four thousand words detailing new ideas and perspectives on any relevant topic, including but not limited to the technical, social, economic, and philosophical developments and implications of Bitcoin, cryptocurrencies, public and decentralized ledgers, distributed consensus, and more. Interested authors should consult the submissions and policies sections on the Ledger website for more details on our focus and scope, submission methods, transparent peer-review process, author guidelines , and open-access policy. The deadline for submissions for the inaugural issue is 31 December 2015, but we will consider submissions after that date for subsequent issues on an ongoing basis. We welcome inquiries by e-mail at ledger@pitt.edu Ledger is the first peer-reviewed journal devoted to the inherently interdisciplinary subject of cryptocurrencies, and is proud to be supported by its distinguished editorial board . It is published quarterly by the University Library System, University of Pittsburgh as an open-access journal and does not charge author fees. Ledger timestamps all published articles in the Bitcoin blockchain, and encourages authors to digitally sign their manuscripts. For further information please visit ledgerjournal.org