民营企业R&D支出与企业价值关系实证研究——基于中小板和创业板市场数据
민영기업R&D지출여기업개치관계실증연구——기우중소판화창업판시장수거
An Empirical Analysis of R&D Investment and Firm Value of Listed Private Companies Based on SME Board and GEM Data
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