人均增加值

DIST < 100

(1)

DIST < 150

(2)

DIST < 200

(3)

DIST < 250

(4)

DIST < 300

(5)

DIST < 350

(6)

TIME×RAD_DIST

0.0604**

0.0461*

0.0588**

0.0649***

0.0730***

0.0626***

(2.1699)

(1.7991)

(2.3815)

(2.6803)

(3.0606)

(2.6587)

Controls

是

是

是

是

是

是

Year & Firm FE

是

是

是

是

是

是

Observations

5298

5298

5298

5298

5298

5298

Adj R-squared

0.0489

0.0482

0.049

0.0494

0.0501

0.0493