Table 7 Spillover effect test results.

From: A quasi-natural experimental study on enterprise innovation driven by urban agglomeration policies in China

Variable

0–100 KM

100–200 KM

200–300 KM

300–400 KM

400+ KM

DID

0.0374

0.222*

− 0.184

0.615***

0.617*

(0.26)

(1.83)

(− 0.81)

(3.18)

(1.87)

Size

0.529***

0.523***

0.530***

0.560***

0.539***

(7.71)

(8.40)

(6.65)

(7.16)

(6.70)

Age

− 0.546**

− 0.540***

− 0.566**

− 0.395

− 0.425

(− 2.57)

(− 2.87)

(− 2.24)

(− 1.62)

(− 1.60)

Lev

− 0.0114***

− 0.0101***

− 0.0123***

− 0.0123***

− 0.0103**

(− 3.00)

(− 3.06)

(− 2.90)

(− 2.85)

(− 2.23)

Sub

− 0.0834*

− 0.0245

− 0.0707

− 0.0406

− 0.0355

(− 1.86)

(− 0.60)

(− 1.42)

(− 0.81)

(− 0.69)

Growth

0.00233

0.0129

0.0254

0.0144

0.00939

(0.08)

(0.55)

(0.84)

(0.48)

(0.29)

Roa

0.506

0.256

− 0.164

− 0.0234

0.169

(0.78)

(0.42)

(− 0.22)

(− 0.03)

(0.22)

Cashflow

0.226

0.246

0.278

0.262

0.312

(1.03)

(1.28)

(1.11)

(1.06)

(1.23)

_ cons

2.570***

1.475*

2.338**

1.132

1.152

(2.69)

(1.67)

(2.24)

(1.08)

(1.08)

Industry

Yes

Yes

Yes

Yes

Yes

Year

Yes

Yes

Yes

Yes

Yes

N

5088

5896

3976

3912

3712

r2

0.442

0.457

0.445

0.470

0.454