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 12

Fixed effect analysis results of panel data (hypothesis 4).

	(1)	(2)	(3)
	Chainnumber of less than or equal to 25%	Chainnumber of 25%–75%	Chainnumber of larger than or equal to 75%
Lnts	0.004	0.028	0.029
	(0.001)	(0.002)	(0.005)
Rdratechain	1.092	2.143	2.274
	(0.178)	(0.375)	(1.497)
Chainnumber	−0.043	−0.009	0.061
	(0.012)	(0.004)	(0.041)
Age	−0.003	−0.032	0.019
	(0.006)	(0.012)	(0.042)
Roa	0.002	−1.59E − 04	3.36E − 04
	(2.98E − 04)	(1.70E − 04)	(0.002)
Owner	−0.011	−0.001	−0.022
	(0.019)	(0.036)	(0.100)
Indgrow	0.001	3.99E − 04	0.002
	(2.36E − 04)	(0.001)	(0.002)
Lnsize	−0.009	−0.010	−0.057
	(0.006)	(0.010)	(0.047)
Lngdp	0.055	0.291	−0.162
	(0.064)	(0.140)	(0.482)
Year	Control	Control	Control
Industry	Control	Control	Control
Speed	0.368	1.227	0.650
	(0.027)	(0.028)	(0.068)
Obs#	2841	3167	344
R^2	0.191	0.500	0.424
Firms	1210	1003	145
F	29.41	165.38	10.54

Note.; ; .