融资渠道、政府补助与中国矿业企业研发投入
郑明贵,张静,董娟

Financing Channels,Government Subsidies and R&D Investment of Chinese Mining Enterprises
Minggui ZHENG,Jing ZHANG,Juan DONG
表3 融资渠道对企业研发投入影响的回归结果
Table 3 Regression results of the influence of financing channels on R&D investment of enterprises
变量回归系数
模型(1)模型(2)模型(3)模型(4)
EnFund0.0043**0.0099***0.0091***
(2.16)(4.92)(3.54)
ExFund0.0080***0.0100***
(6.58)(8.06)
Equity0.0161***
(7.25)
Debt0.0028
(1.40)
Size-0.3900***-0.4370***-0.4720***-0.2930***
(-17.72)(-20.34)(-23.66)(-12.46)
Age-0.4500***-0.6750***-0.5220***-0.4820***
(-4.83)(-5.60)(-5.03)(-5.62)
Share0.0064***0.0075***0.0070***0.0069***
(2.67)(3.13)(2.86)(3.05)
Cap1.2460***1.4200***1.5660***1.6730***
(7.21)(7.95)(8.90)(10.14)
Growth-0.0445**-0.0461**-0.0486**-0.0416**
(-2.23)(-2.31)(-2.38)(-2.13)
year控制控制控制控制
cons10.9900***12.6300***12.8900***8.0880***
(18.06)(23.87)(24.71)(12.37)
Wald chi2427.24***656.91***966.74***892.46***
N849847847844