Inside University of Groningen's largest research partnership: Radboud University Nijmegen

Behind University of Groningen's research output sits a defining relationship: 2,403 co-authored works with Radboud University Nijmegen (Netherlands) in the five years to 2025, the university's single largest collaboration.

It anchors an unusually connected research base: 1,160 collaborating institutions across 80 countries, producing 50,498 joint works over the window, with international co-authors on 56% of output.

The collaborative work travels: its field-weighted citation impact stands at 3.73, 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.