Inside Humboldt-Universität zu Berlin's largest research partnership: Freie Universität Berlin

Behind Humboldt-Universität zu Berlin's research output sits a defining relationship: 9,766 co-authored works with Freie Universität Berlin (Germany) in the five years to 2025, the university's single largest collaboration.

It anchors an unusually connected research base: 1,113 collaborating institutions across 79 countries, producing 39,093 joint works over the window, with international co-authors on 46% of output.

The collaborative work travels: its field-weighted citation impact stands at 3.43, where the world average is 1.0.

The Research Collaboration Index, the first global account of how universities actually collaborate, publishes its first full edition on Tuesday 15 September at 09:00 UK.

Every figure derives from the open global research record and is checkable at source.