Inside Carl von Ossietzky Universität Oldenburg's largest research partnership: University of Bremen

Behind Carl von Ossietzky Universität Oldenburg's research output sits a defining relationship: 296 co-authored works with University of Bremen (Germany) in the five years to 2025, the university's single largest collaboration.

It anchors an unusually connected research base: 902 collaborating institutions across 74 countries, producing 22,173 joint works over the window, with international co-authors on 36% of output.

The collaborative work travels: its field-weighted citation impact stands at 2.38, 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.