We analyse inter-regional research collaboration as measured by scientific publications and patents with multiple addresses, covering 1316 NUTS3 regions in 29 European countries. The estimates of gravity equations show the effects of geographical and institutional distance on research collaboration. We also find evidence for the existence of elite structures between excellence regions and between capital regions. The results suggest that current EU science policy to stimulate research collaboration is legitimate, but doubt the compatibility between EU science policy and EU cohesion policy.
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