Simulating Transition to Open Access

The Open Access (OA) movement, which postulates gratis and unrestricted online access to publicly funded research findings, has significantly gained momentum in recent years. The two ways of achiev-ing OA are self-archiving of scientific work by the authors (Green OA) and publishing in OA journals (Gold OA). But there is still no consensus which model should be supported in particular. The aim of this simulation study is to discover mechanisms and predict developments that may lead to specific outcomes of possible market transformation scenarios. It contributes to theories related to OA by sub-stantiating the argument of a citation advantage of OA articles and by visualizing the mechanisms of a journal system collapsing in the long-term due to the continuation of the serials crisis. The practical contribution of this research stems from the integration of all market players: Decisions regarding potential financial support of OA models can be aligned with our findings – as well as the decision of a publisher to migrate his journals to Gold OA. Our results indicate that for scholarly communication in general, a transition to Green OA combined with a certain level of subscription-based publishing and a migration of few top journals is the most beneficial development.