Table 6.
Scenario | Variables | Window | Statistical analysis |
|||
---|---|---|---|---|---|---|
Mean | Std. dev. | t-test | Wilcoxon | |||
Before the rising value-added tax, 2019 (VAT = 5 %) | [-7,+7] | 1.420 | 1.030 | 1.4376 | 0.860838 | |
[-7,+7] | 0.510 | 0.380 | 0.3244 | −0.21294 | ||
[-7,+7] | 1.420 | 1.030 | 1.5906∗∗ | −0.80323 | ||
[-7,+7] | 0.036 | 0.046 | 0.0045∗∗ | 0.004831∗∗ | ||
[-7,+7] | 0.038 | 0.044 | 0.0180 | 0.013875 | ||
[-7,+7] | 0.013 | 0.052 | 0.0132 | 0.008664 | ||
[-7,+7] | −0.00014 | 0.015 | −0.00036 | −0.0041 | ||
[-7,+7] | 0.015 | 0.390 | 0.0081 | 0.0138∗∗∗ | ||
[-7,+7] | −0.017 | 0.053 | −0.0394 | −0.0463 | ||
[-7,+7] | −0.017 | 0.026 | −0.0472 | −0.0389 | ||
[-7,+7] | 0.041 | 0.050 | 0.0829 | 0.2207∗ | ||
After the rising value-added tax, 2020 (VAT = 15 %) | [-7,+7] | 1.440 | 0.960 | 0.7894 | 1.095 | |
[-7,+7] | 0.530 | 0.410 | 0.4241 | −0.1444 | ||
[-7,+7] | 1.440 | 0.960 | 0.8090∗∗ | 0.5864∗ | ||
[-7,+7] | 0.035 | 0.053 | 0.0195∗∗ | 0.0224∗ | ||
[-7,+7] | 0.046 | 0.055 | 0.0407 | 0.0326 | ||
[-7,+7] | 0.013 | 0.054 | 0.01658 | 0.0122 | ||
[-7,+7] | 0.0065 | 0.025 | 0.0269 | 0.0239 | ||
[-7,+7] | 0.0025 | 0.043 | 0.0054∗∗∗ | −0.0880 | ||
[-7,+7] | 0.0048 | 0.0088 | 0.0033 | 0.0614 | ||
[-7,+7] | −0.010 | 0.024 | −0.0174 | −0.0203∗∗∗ | ||
[-7,+7] | 0.044 | 0.044 | 0.0571 | 0.0543 |
∗∗∗, ∗∗, ∗ represent 1, 5, and 10 % significance levels, respectively.