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