Inside Indiana University's largest research partnership: Indiana University - Purdue University Indianapolis

Behind Indiana University's research output sits a defining relationship: 28,241 co-authored works with Indiana University - Purdue University Indianapolis (United States) in the five years to 2025, the university's single largest collaboration.

It anchors an unusually connected research base: 1,163 collaborating institutions across 81 countries, producing 13,449 joint works over the window, with international co-authors on 26% of output.

The collaborative work travels: its field-weighted citation impact stands at 2.87, 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.