The Influence of Big Data Analytics on E-Commerce: Case Study of the U.S. and China

Table 16

Sobel test for the mediation effects.

Mediation variable
Y09				Y10				Y11				Y12				Y13
Input		Sobel test		Input		Sobel test		Input		Sobel test		Input		Sobel test		Input		Sobel test
	0.056	Test statistic	0.726		0.011	Test statistic	0.196		0.003	Test statistic	0.379		0.038	Test statistic	1.039		0.004	Test statistic	-1.079
	1.001	Std. error	0.077		1.304	Std. error	0.073		6.309	Std. error	0.050		1.906	Std. error	0.070		-14.736	Std. error	0.055
	0.013	value	0.468		0.003	value	0.845		0.001	value	0.704		0.010	value	0.299		0.001	value	0.280
	1.360				6.650				16.496				1.765				13.145

 = raw (unstandardized) regression coefficient for the association between X02 and mediator;  = standard error of ;  = raw coefficient for the association between the mediator and the Y02 (when the X02 is also a predictor of the Y02);  = standard error of ; calculation for the Sobel test from online, http://quantpsy.org/sobel/sobel.htm. Y09: founded number of data companies in the U.S. (total); Y10: founded number of data companies in the U.S. classified as data/technology; Y11: founded number of data companies in the U.S. classified as business analytics; Y12: founded number of data companies in the U.S. classified as industrial application; Y13: founded number of data companies in the U.S. classified as research/consulting.