A centralized collection of evaluation studies can reduce the costs of obtaining relevant information for everybody. Such a repository can improve transparency by making it easier and less costly for (internal) evaluators and external stakeholder to keep track of evaluation work. Technical solutions can range from a website to more structured repositories.
Other fields, such as development economics or medicine often rely on repositories in order to structure available evidence.4 Replicability is an important element of transparency. Replicability ensures that policy decisions are based on robust evidence and on results which survive changes in the set-up of the empirical model.