An Empirical Study on Response to Online Customer Reviews and E-Commerce Sales: From the Mobile Information System Perspective
Table 4
Regression results of moderating effect.
SYS-GMM model
Fixed effect of panel data
Model 1
Model 2
Model 3
Model 4
Model 5
Model 6
Ratio of response to negative review
0.705 (0.174)
0.778 (0.112)
0.611 (0.298)
0.412 (0.177)
0.709 (0.177)
0.387 (0.098)
Ratio of response to positive review
0.201 (0.098)
0.210 (0.086)
0.107 (0.060)
0.075 (0.040)
0.165 (0.030)
0.071 (0.015)
Wald test value ( value)
4.37 (0.000)
4.43 (0.000)
4.77 (0.000)
3.77 (0.000)
4.51 (0.000)
3.98 (0.000)
Ratio of response to negative review × product price
0.105 (0.016)
0.098 (0.020)
0.179 (0.044)
0.156 (0.043)
Ratio of response to positive review × product price
0.078 (0.006)
0.056 (0.010)
0.075 (0.020)
0.069 (0.018)
Ratio of response to negative review × product heterogeneity
0.096 (0.013)
0.076 (0.019)
0.099 (0.014)
0.086 (0.020)
Ratio of response to positive review × product heterogeneity
0.073 (0.011)
0.018 (0.006)
0.045 (0.010)
0.033 (0.011)
Other control variables
Included
Included
Included
Included
Included
Included
Wald chi2
250.69
205.25
208.42
Sargan test ( value)
23.805 (0.587)
14.396 (0.952)
14.614 (0.950)
AR2 ( value)
0.509 (0.611)
−0.130 (0.896)
−0.188 (0.851)
R2
0.243
0.265
0.239
F value
136.17
121.36
62.01
Number of observed values
25798
25798
25798
25798
25798
25798
Note. The dependent variable is the sales volume. “∗,” “∗∗,” and “∗∗∗” in the table mean that z-statistics are significant at the levels of 10%, 5%, and 1%.