|  | 
	
		|  | 
	
		| Dusanee  Kesavayuth | 
	
		|  | 
	
		| ''Patent licensing and research exemption'' | 
	
		| ( 2009, Vol. 29 No.2 ) | 
	
		|  | 
	
		|  | 
	
		| Within an environment of sequential innovations, real world evidence suggests that the licensing decision of the initial patent can occur either before or after the R&D investment of the follow-on invention. The possibility of licensing after the follow-on invention exists due to the presence of research exemption. This paper examines how the research exemption influences the licensor''s decision to license prior to the discovery of the follow-on invention. Within a three firm setting, the paper reveals that the research exemption does not alter the licensing decision while promoting a stream of future inventions. This provides an argument in support of research exemption as legal scheme. | 
	
		|  | 
	
		|  | 
	
		| Keywords: patent,  licensing,  research exemption | 
	
		| JEL: L5 - Regulation and Industrial Policy: General 
 | 
	
		|  | 
	
		| | Manuscript Received : Feb 18 2009 |  | Manuscript Accepted : May 12 2009 | 
 |