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| Nhat thien Tran |
| Dalat University |
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| Faculty of Economics and Business Administration |
| Dalat University, Vietnam |
| 01 Phu Dong Thien Vuong str,. |
| Dalat, Lamdong 670000 |
| Việt Nam |
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| thientn@dlu.edu.vn |
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JEL Areas:
A1 : General Economics: General.
C6 : Mathematical Methods and Programming: General |
