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| 2013, Vol. 1(2): 138-143 DOI: | ||
| Research on Financial Development, Financial Constraints and R&D Investment Efficiency of Hi-tech Enterprises | ||
| ZHAI Shu-ping1, GU Qun2 | ||
| (1.School of Statistics, Tianjin University of Finance and Economics, Tianjin 300222, China;(2.Business School, Tianjin University of Finance and Economics, Tianjin 300222, China) | ||
| Received 2012-08-30 Revised 2013-03-06 | ||
| Supporting info | ||
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