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| Songtao Wu |
| Zhengzhou Information Engineering University |
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| Building 75-1-701 |
| # 5, Jian-Xue Street |
| Wen-Hua Road |
| Zhengzhou, Henan 450002 |
| 中国 |
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| daif02@163.com |
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JEL Areas:
C5 : Econometric Modeling: General
C3 : Multiple or Simultaneous Equation Models: General |
