The Influence of Outward Foreign Direct Investment on Enterprise Technological Innovation

Table 12

ATT test based on relevant measurement indicators of enterprise innovation capability.

		(1) Mixing	(2) R&D investment	(3) Number of patent applications	(4) Proportion of highly skilled workers	(5) Innovation value realization
ETI	2015	0.3492(6.219)	0.3021(5.994)	0.3149(5.871)	0.1542(3.058)	0.5737(6.481)
	2016	0.3207(6.162)	0.3842(6.429)	0.2984(5.804)	0.3599(6.273)	0.3374(6.592)
	2017	0.3027(6.947)	0.4172(7.442)	0.2838(6.547)	0.2994(6.430)	0.3126(6.746)

Note. , , and represent significant at the levels of 1%, 5%, and 10%, respectively.