Research on the Influence Mechanism of the Across-Industrial-Chain Investment Speed on Innovation Performance of AI Enterprises: Improvement Path of Artificial Intelligence Technology Application

Table 10

Fixed effect analysis results of panel data (hypothesis 3).

	(1)	(2)	(3)
	Rdratechain of less than or equal to 25%	Rdratechain of 25%–75%	Rdratechain of larger than or equal to 75%
Lnts	0.018	0.022	0.020
	(0.002)	(0.001)	(0.002)
Rdratechain	−3.133	1.191	−10.128
	(3.843)	(1.518)	(174.068)
Chainnumber	0.012	0.010	0.008
	(0.003)	(0.001)	(0.002)
Age	0.009	−0.023	−0.033
	(0.021)	(0.011)	(0.353)
Roa	−9.37E − 05	0.001	0.002
	(1.59E − 04)	(0.001)	(0.001)
Owner	−0.012	−0.015	−0.009
	(0.059)	(0.032)	(0.052)
Indgrow	−1.22 − E − 04	0.001	−0.002
	(0.001)	(4.29E − 04)	(0.001)
Lnsize	−0.026	−0.015	−0.028
	(0.014)	(0.011)	(0.018)
Lngdp	0.033	0.265	−0.135
	(0.214)	(0.130)	(0.164)
Year	Control	Control	Control
Industry	Control	Control	Control
Speed	0.837	1.020	1.000
	(0.042)	(0.026)	(0.046)
Obs#	1590	3385	1377
R^2	0.365	0.463	0.423
Firms	657	1170	568
F	40.70	145.83	44.81

Note.; ; .