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中文摘要：
本文基于软件与信息企业的微观截面数据，应用Tobit模型，检验了研发投入与企业规模、所有制类型及政府补贴等因素的关系。研究发现，研发投入与企业规模存在U型关系，国有企业同其他类型企业相比，在研发投入上未表现出显著差异，企业年龄、企业利润率与研发投入具有显著的负向关系，政府补贴有利于企业研发投入，出口、资本密集度对企业研发投入无显著性影响。
英文摘要：
Using the software and information enterprises ＇ cross - section data and the Tobit model, this paper tests the relation- ship of R＆D and influence factors, including enterprise scale, ownership type, government subsidy, etc. We find that R＆D investment and enterprise scale has a U - type relationship, there is no significant difference between SOE and other ownership types of enterprises in the R＆D investment, while age and profit rate have a significantly negative effect on R＆D, but government subsidy is benefit to R＆D, while export and capital intensity have no significant relationship with R＆D investment.
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