Inside University of the Basque Country's largest research partnership: Universitat de Barcelona

Behind University of the Basque Country's research output sits a defining relationship: 765 co-authored works with Universitat de Barcelona (Spain) in the five years to 2025, the university's single largest collaboration.

It anchors an unusually connected research base: 1,085 collaborating institutions across 79 countries, producing 30,480 joint works over the window, with international co-authors on 36% of output.

The collaborative work travels: its field-weighted citation impact stands at 2.42, 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.