求翻译：Schankerman and Pakes, 1986; Maurseth, 2005 ; and Bessen, 2008 ). Patent value is an interesting economic quantity for several是什么意思？

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Schankerman and Pakes, 1986; Maurseth, 2005 ; and Bessen, 2008 ). Patent value is an interesting economic quantity for several

问题补充：

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匿名	2013-05-23 12:23:18

匿名	2013-05-23 12:24:58

匿名	2013-05-23 12:26:38

匿名	2013-05-23 12:28:18

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