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2 变量描述性统计结果

Table 2 Descriptive statistical results of variables

变量 平均值 标准差 最小值 最大值 R&D 0.017 0.017 0.000 0.152 EnFund 0.162 0.142 -0.639 0.554 ExFund 0.009 0.092 -0.308 0.527 Equity 0.296 0.171 0.026 1.148 Debt 0.241 0.142 0.000 0.663 Sub 0.004 0.007 0.000 0.114 Size 23.310 1.577 20.015 28.636 Age 2.802 0.283 1.609 3.526 Share 43.407 16.698 3.390 89.990 Cap 0.317 0.137 0.000 0.766 Growth 0.142 0.789 -0.634 19.702