(1)

(2)

替换被解释变量

更换研究周期

score1

0.4279^***

0.3837^***

(3.5861)

(2.9860)

sca

6.0144^***

6.1594^***

(6.1974)

(5.7754)

eco

0.000006086^*

0.000003988

(1.8676)

(1.0420)

research

0.00006024

0.00002792

(0.6820)

(0.2944)

buy

−1.318e−07

−5.318e−08

(−0.5081)

(−0.1970)

_cons

14.810^***

14.759^***

(35.6867)

(32.6154)

N

275

247

R²

0.6503

0.6342