With every day seemingly bringing an escalation of tensions on the Korean peninsula, the academic field of international relations and study of nuclear weapons proliferation is as important as ever.

But a new analysis of bibliometric data suggests that research output on this particular issue has been falling across the world in recent years and has a very low rate of academic cross-border collaboration.

According to the figures, produced for Times ÖйúAƬ by publisher Elsevier from its Scopus database, worldwide publications featuring nuclear proliferation as a key topic fell from 322 in 2012 to 52 in 2016 while the international collaboration rate for such research last year was just 3.9 per cent.

Across the five years, universities in the US produced by far the most research on nuclear proliferation, with Stanford University and Georgetown University leading the way. However, China and South Korea ¨C driven by research from the Korea Advanced Institute of Science and Technology ¨C are also notable by their appearance among nations with the most scholarship on the issue.

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Top institutions for publications featuring nuclear proliferation as a key topic?

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Source: Elsevier/Scopus

According to Elsevier data scientist Thomas Gurney, who conducted the data analysis, the international collaboration rate for research featuring nuclear proliferation as a key phrase was ¡°unusually low¡±.

The 2016 rate of 3.9 per cent was not a blip either ¨C in 2012 the rate was 6.7 per cent and it did not climb above 10 per cent in the intervening years.

¡°On average, international collaboration shares across all subject areas in the world are 18 per cent,¡± said Dr Gurney. ¡°International collaboration in social sciences is 11.5 per cent. It¡¯s interesting that nuclear proliferation, a global issue, has such low international collaboration.¡±

James Johnson, an expert on weapons proliferation and honorary fellow in the?School of History, Politics and International Relations?at the University of Leicester, said he had "mulled over for some time" the reasons why there was such poor cross-border collaboration on the issue.

He believed one factor was that?non-proliferation debates in the UK had tended to be "siloed off" from those surrounding the US, where topics focused more on themes like the country's missile technology and dealing with North Korea and Iran. "In contrast, debates in the UK centre on Trident, nuclear energy, and the need for a nuclear deterrent in the context of Nato, a revanchist Russia, and to a lesser extent Iran," he said.?

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Dr Johnson added that he and colleagues "had made efforts to deepen the level of collaboration between UK scholars and our US partners" however, including through academic conferences organised under the British International Studies Association.??

In terms of international relations and political science research generally, the US and UK again lead the world for the most publications produced: more than 23,000 pieces of research were produced by the countries between 2012 to 2016, more than the combined output of the next 12 nations. Three UK universities ¨C the University of Oxford, London School of Economics and King¡¯s College London ¨C had the highest output over the period.

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Top institutions for publications in international relations and political science

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Source: Elsevier/Scopus

Meanwhile, a keyword analysis of the field shows how China and India have been the major focus of study for scholars over the past five years. Aside from ¡°politics¡± as a key phrase, the nations are the top two most occurring words in the subject, with the European Union also making the top 10.

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Top 10 key phrases for research?in international relations and political science

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Source: Elsevier/Scopus

North Korea does not make the top 50 as a key phrase, Dr Gurney said, although the period covered was before this year¡¯s crisis.

simon.baker@timeshighereducation.com