匹配变量 |
| 均值 | 标准偏差(10%) | 标准偏差减少 幅度(%) | t统计量 | T检验相伴概率 | |
实验组 | 对照组 | ||||||
Value
| 匹配前 | 0.216 | 0.284 | −13.9 | 16.1 | −0.88 | 0.382 |
匹配后 | 0.198 | 0.256 | −11.6 | −0.51 | 0.602 | ||
Size | 匹配前 | 24.349 | 23.222 | 62.6 | 75.5 | 4.43 | 0.000 |
匹配后 | 24.286 | 24.562 | −15.3 | −0.69 | 0.489 | ||
Cash | 匹配前 | 0.013 | 0.005 | 12.6 | 93.6 | 0.80 | 0.424 |
匹配后 | 0.013 | 0.014 | −0.8 | −0.04 | 0.970 | ||
Lev | 匹配前 | 0.589 | 0.649 | −2.7 | 26.1 | −0.14 | 0.892 |
匹配后 | 0.585 | 0.540 | 2.0 | 1.04 | 0.300 | ||
Board | 匹配前 | 2.237 | 2.225 | 5.6 | 38.2 | 0.35 | 0.725 |
匹配后 | 2.243 | 2.251 | −3.4 | −0.17 | 0.869 | ||
Ins | 匹配前 | 0.084 | 0.065 | 15.0 | 36.7 | 1.13 | 0.259 |
匹配后 | 0.072 | 0.060 | 9.5 | 0.50 | 0.621 |