研发投资对企业技术进步影响的异质门槛效应

Publisher: 国家哲学社会科学学术期刊数据库

E-ISSN: 1002-6711|volume|9|85-89

ISSN: 1002-6711

Source: 中国科技论坛, Vol.volume, Iss.9, 2016-01, pp. : 85-89

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Abstract