变量

L.cmw (1)

L2.cmw (2)

coverage

0.003^**

(0.9181)

0.006^**

(1.4991)

usage_depth

0.001^*

(1.2319)

0.002^**

(2.1654)

digitization

0.000

(0.5824)

−0.001

(−1.4754)

年度固定

YES

YES

省域固定

YES

YES

Controls

YES

YES

N

311

311

R²

0.495

0.407

F-test

0.000

0.000