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		| Cuong  Nguyen | 
	
		| National Economics University and Mekong Development Research Institute, Hanoi, Vietnam | 
	
		| c_nguyenviet@yahoo.com | 
	
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		| So 3, ngo 68, Nguy Nhu Kon Tum, Thanh Xuan | 
	
		| Hanoi, 10000, Vietnam | 
	
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		| Second Author: 
 
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		| Ha  Le | 
	
		| Mekong Development Research Institute | 
	
		| hale@mdri.org.vn | 
	
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		| Hanoi, 10000, Vietnam | 
	
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		| https://ideas.repec.org/e/png36.html | 
	
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		| Third Author: 
 
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		| Tung  Phung | 
	
		| Mekong Development Research Institute, Hanoi, Vietnam | 
	
		| tungphung@mdri.org.vn | 
	
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