Abstract
To understand how the specialisation patterns of cities differ among scientific fields, we study patterns of knowledge production in Astrophysics, Biotechnology, Nanotechnology and Organic Chemistry in the period 1996–2012. Using keywords from journal publications, we find systematic differences across scientific fields, but remarkable similarities across cities within each field. Biotechnology shows a turbulent pattern with comparative advantages that are short lasting, and with few related topics are available for research locations. Astrophysics—and in later years Nanotechnology—show a pattern of stable rankings, comparative advantages that last longer, and many related topics potentially available for research locations. Organic Chemistry has an intermediate position. Thus, fields of knowledge production have fundamentally different characteristics that require different smart specialisation strategies taking into account the differences in accumulation and relatedness.
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