  We describe collaboration networks consisting of research projects funded by
the European Union and the organizations involved in those projects. The
networks are of substantial size and complexity, but are important to
understand due to the significant impact they could have on research policies
and national economies in the EU. In empirical determinations of the network
properties, we observe characteristics similar to other collaboration networks,
including scale-free degree distributions, small diameter, and high clustering.
We present some plausible models for the formation and structure of networks
with the observed properties.
