Scientific collaboration between 'old' and 'new' member states: Did joining the European Union make a difference?

Scientometrics · 2016 · PMC4757627 · PMID 26924863

Europe PMC DOI

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an increasing trendno p-value reported

Firstly, the results show an increasing trend in the co-publication intensity within the EU-15 (comparison group).

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.