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		| Jose  Plehn-Dujowich | 
	
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		| ''Innovation, Firm Size, and R&D Search'' | 
	
		| ( 2007, Vol. 12 No.18 ) | 
	
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		| We present evidence that small firms perform two to four times more innovations per dollar of R&D than large firms.  We propose a search theory of R&D that accounts for the evidence.  A firm incurs R&D expenses until it has discovered a level of R&D productivity that is sufficiently great to warrant stopping the search.  We show that because the large number of R&D projects run by a large firm becomes a substitute for enhanced R&D productivity, the average R&D productivity of a firm is decreasing in firm size. | 
	
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		| Keywords: | 
	
		| JEL: L2 - Firm Objectives, Organization, and Behavior: General O3 - Technological Change; Research and Development: General
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		| | Manuscript Received : Jun 22 2007 |  | Manuscript Accepted : Aug 31 2007 | 
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