Table 4 Results of instrumental variable estimation.

From: Does China’s innovation-driven policy affect enterprises’ import performance of intermediate goods?

Variable

Import quantity of intermediate goods

Import variety of intermediate goods

Import quality of intermediate goods

\({T}_{{it}}\)

0.6213*** (0.0178)

0.0362*** (0.0105)

0.3784*** (0.0095)

Control variable

Yes

Yes

Yes

Firm fixed effect

Yes

Yes

Yes

Year fixed effect

Yes

Yes

Yes

N

51784

42652

51432

R2

0.1140

0.0090

0.1090

Estimation results for the first stage

Instrumental variable

0.996*** (0.0048)

0.0464*** (0.0058)

0.2662*** (0.0020)

Control variable

Yes

Yes

Yes

Kleibergen‒Paap rk LM statistic

181.533***

189.623***

186.184***

Cragg–Donald Wald F statistic

660.555

568.167

784.305

  1. Note: As above.