[5] In 2019, Green co-founded Coherent Digital to improve access to grey literature policy documents from IGOs, NGOs, research centers and think tanks.

[1] As of January 2001, Green launched SourceOECD, the first digital initiative to distribute books, journals and statistical databases through a commonly searchable subscription service that grouped publications into thematic clusters.

In 2007, OECD made all of its books free to read in a basic form under a freemium business model, with additional premium services and print copies available for a fee.

[16] In June 2022, Content Digital reached an agreement with the Center for Research Libraries (CRL) under which many CRL affiliated institutions became founding institutional members of Policy Commons and received discounts or complimentary access[6] In May 2023, Policy Commons was expanded to include World Cities, world-wide archives of municipal reports, in addition to its existing policy collections for North American City Reports and Global Think Tanks.

[24] He helped to develop the guidelines for the production of scientific and technical reports of the Grey Literature International Steering Committee.