The invention concerns accepting documents for publication. In particular, but not limited to, the invention concerns the publication of research related papers, such as publishing academic manuscripts on the Internet. The invention also concerns determining an indication of the quality of a document. Using the invention documents are accepted or rejected for publication, and/or an indication of the quality of a document is determined based on market forces associated with the selling of shares in the document. The participants all trade in the virtual market place with the aim of increasing the number of tokens that they own which reflects their reputation as an assessor of documents. This affects the value of shares in documents by increasing the value of documents of a higher quality. Aspects of the invention includes methods, a computer system and software applications used to perform the methods.