tobit模型

probit模型

变量

创新强度

是否有创新产出

(1)

(2)

(3)

(4)

(5)

(6)

族谱

−0.0017^***

−0.0022^***

−0.0048^***

−0.0082^***

−0.0101^***

−0.0165^***

(0.00057)

(0.00057)

(0.00065)

(0.00231)

(0.00234)

(0.00252)

销售额

0.0099^***

0.0137^***

0.0380^***

0.0502^***

(0.00068)

(0.00071)

(0.00296)

(0.00296)

销售额二次项

−0.0001^***

−0.0001^***

−0.0003^***

−0.0004^***

(0.00001)

(0.00001)

(0.00004)

(0.00004)

出口占销售比

0.2452^***

0.2152^***

1.0014^***

0.8882^***

(0.01157)

(0.01257)

(0.04855)

(0.05100)

利润率滞后项

0.0916

−0.1486^**

0.6379^**

−0.7546^**

(0.06925)

(0.07263)

(0.29872)

(0.30493)

人均资本

0.8485^***

0.7054^***

2.8598^***

2.5658^***

(0.16666)

(0.17512)

(0.71545)

(0.72001)

广告密度

19.0465^***

17.7792^***

105.4517^***

101.4249^***

(2.12353)

(2.15607)

(10.16684)

(9.95560)

广告密度二次项

−681.6390^***

−612.9875^***

−3,846.7127^***

−3,544.8940^***

(104.24029)

(105.65064)

(517.84187)

(504.69311)

企业年龄

0.0046^***

0.0037^***

0.0217^***

0.0164^***

(0.00056)

(0.00058)

(0.00233)

(0.00225)

县人均GDP

0.0024^***

0.0089^***

(0.00033)

(0.00131)

常数项

−0.7333^***

−0.8646^***

−1.0894^***

−3.1093^***

−3.4921^***

−4.3086^***

(0.00863)

(0.01254)

(0.06669)

(0.03183)

(0.05002)

(0.26495)

年份

YES

YES

YES

YES

YES

YES

行业

NO

NO

YES

NO

NO

YES

省份

NO

NO

YES

NO

NO

YES

样本量

74,202

74,202

74,202

74,202

74,202

74,022