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 8

Fixed effect analysis results of panel data (hypothesis 2).

	(1)	(2)	(3)
	Lnts of less than or equal to 25%	Lnts of 25%–75%	Lnts of larger than or equal to 75%
Lnts	0.017	0.013	0.008
	(0.029)	(0.005)	(0.005)
Rdratechain	0.043	2.416	2.577
	(0.615)	(0.286)	(0.525)
Chainnumber	0.014	4.50 E −04	0.011
	(0.003)	(0.001)	(0.002)
Age	−0.018	−0.014	−0.037
	(0.019)	(0.010)	(0.014)
Roa	−0.001	0.002	−1.63 − E − 04
	(0.001)	(4.14E − 04)	(1.51E − 04)
Owner	−0.045	−0.018	0.042
	(0.068)	(0.030)	(0.041)
Indgrow	−0.001	4.86E − 04	−1.79E − 04
	(0.001)	(3.79E − 04)	(0.001)
Lnsize	−0.049	−0.011	−0.021
	(0.024)	(0.008)	(0.016)
Lngdp	0.236	0.207	0.393
	(0.218)	(0.118)	(0.162)
Year	Control	Control	Control
Industry	Control	Control	Control
Speed	0.310	1.469	1.577
	(0.055)	(0.029)	(0.048)
Obs#	1192	3391	1769
R^2	0.101	0.567	0.586
Firms	504	1190	760
F	5.83	220.79	108.46

Note.; ; .