Table 3 PSM-DID regression results.

From: Impact of enhancing national autonomous innovation demonstration zones on cities’ efficiency in technological innovation

Variables

(1)

(2)

(3)

(4)

(5)

(6)

Radius matching

Kernel matching

Nearest-neighbour matching

did

0.096***

0.065***

0.109***

0.065***

0.099***

0.059***

(0.022)

(0.021)

(0.018)

(0.021)

(0.022)

(0.021)

control

N

Y

N

Y

N

Y

City

Y

Y

Y

Y

Y

Y

Year

Y

Y

Y

Y

Y

Y

N

1815

1815

1813

1813

1650

1650

R2

0.252

0.293

0.258

0.297

0.336

0.326

  1. ***p < 0.01, **p < 0.05, *p < 0.1.
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