Innovation efficiency and spatial spillover in urban agglomerations: A case of the Beijing‐Tianjin‐Hebei, the Yangtze River Delta, and the Pearl River Delta
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2006 ◽
2009 ◽
Vol 4
(2)
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pp. 228-249
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2014 ◽
Vol 30
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pp. 42-55
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2013 ◽
Vol 93
(2)
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pp. 341-365
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