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| Md Abdul Wadud |
| Department of Economics, Rajshahi University, Rajshahi 6205, Bangladesh |
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| Department of Economics |
| Rajshahi University |
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| Rajshahi, 6205 |
| Bangladesh |
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| wadud68@yahoo.com |
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JEL Areas:
C0 : Mathematical and Quantitative Methods: General
O3 : Technological Change; Research and Development: General |
