高科技资质认定政策有效性研究——基于双重差分PSM方法的检验

Publisher: 国家哲学社会科学学术期刊数据库

E-ISSN: 1009-2382|volume|9|75-82

ISSN: 1009-2382

Source: 现代经济探讨, Vol.volume, Iss.9, 2017-01, pp. : 75-82

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Abstract