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R&D Intensity and Acquisitions in High‐Technology Industries: Evidence from the US Electronic and Electrical Equipment Industries[J] . Bruce A.Blonigen,Christopher T.Taylor.The Journal of Industrial Economics . 2003 (1)
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Exploratory spatial data analysis of the distribution of regional per capita GDP in Europe, 1980?1995[J] . Julie Gallo,Cem Ertur.Papers in Regional Science . 2003 (2)