Researchers calculated the fraction of papers with international co-authorships in a dataset from the United States National Science Foundation's 2014 Science and Engineering Indicators for seven different scientific fields over the period 1997-2012, and compared the results with earlier studies from the 1970s and early 1990s, finding that the difference in collaboration patterns between basic and applied fields has decreased since 1973 and suggesting a convergence between basic and applied sciences.
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