Inside University of Colorado Boulder's largest research partnership: California Institute of Technology

Behind University of Colorado Boulder's research output sits a defining relationship: 1,077 co-authored works with California Institute of Technology (United States) in the five years to 2025, the university's single largest collaboration.

It anchors an unusually connected research base: 1,089 collaborating institutions across 77 countries, producing 40,706 joint works over the window, with international co-authors on 35% of output.

The collaborative work travels: its field-weighted citation impact stands at 3.39, 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.