By Hoekman Jarno   Frenken Koen   Oort Frank   in The Annals of Regional Science

ISSN:0570-1864|43|3|721-738

Springer Publishing Company ‎(2009)‎

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By Hoekman Jarno   Scherngell Thomas   Frenken Koen   Tijssen Robert   in Journal of Economic Geography

ISSN:1468-2710|13|1|23-52

Oxford University Press‎(2013)‎

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By Vinciguerra Sandra   Frenken Koen   Hoekman Jarno   van Oort Frank   in Economics of Innovation and New Technology

ISSN:1043-8599|20|5|517-537

Routledge Ltd‎(2011)‎

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