Sources of strength: mapping the defence sector in Europe.

The European Union defence sector is not only crucial for the EU's security, but it is also a major industrial asset for EU member states, as it may foster innovation and greater integration among member states, as well as facilitate technology transfer. The understanding of and inferences about the sector, however, are laborious since data on the defence industry in Europe is often contradictory and confused and it is mostly compared at the national not at the European level. As a contribution to address such shortcomings and as opening piece for this Special Issue, this article focuses on the finding, collecting, cleaning, and organizing data on the geographical concentration/location of EU defence industries. This is a fully original descriptive analysis of the current situation, and it provides a reliable basis on the concentration/location of defence companies. This paper represents a firm basis from which to explore (in future research) how defence companies contribute to the technological integration of the EU and it should help the reader to better understand the following articles in this Special Issue. [ABSTRACT FROM AUTHOR]