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. 2024 Oct 10;10(20):e39137. doi: 10.1016/j.heliyon.2024.e39137

Table 6.

Cumulative abnormal returns in the capital goods industry during different event window periods.

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

∗∗∗, ∗∗, ∗ represent 1, 5, and 10 % significance levels, respectively.