样本 | 统计值 | DA | PAY | STOCK | STR | LEV | ROA |
国有样本 | 均值 | 0.052 | 13.790 | 0.011 | 13.168 | 0.567 | 0.567 |
标准差 | 0.398 | 0.913 | 0.079 | 4.231 | 0.355 | 0.355 | |
最小值 | −6.666 | 10.307 | 0 | 2 | 0.016 | 0.016 | |
最大值 | 8.927 | 16.487 | 1.095 | 22 | 8.611 | 8.611 | |
样本 | 951 | 951 | 951 | 951 | 951 | 951 | |
非国有样本 | 均值 | 0.034 | 13.874 | 0.037 | 13.072 | 0.525 | 0.032 |
标准差 | 0.797 | 0.868 | 0.183 | 4.256 | 0.569 | 0.228 | |
最小值 | −47.901 | 9.602 | 0 | 1 | 0.007 | −3.529 | |
最大值 | 3.881 | 17.352 | 9.748 | 24 | 13.711 | 10.401 | |
样本 | 3762 | 3762 | 3762 | 3762 | 3762 | 3762 | |
整体样本 | 均值 | 0.038 | 13.857 | 0.032 | 13.091 | 0.533 | 0.026 |
标准差 | 0.734 | 0.878 | 0.167 | 4.251 | 0.533 | 0.235 | |
最小值 | −47.902 | 9.602 | 0 | 1 | 0.007 | −6.776 | |
最大值 | 8.927 | 17.352 | 9.748 | 24 | 13.711 | 10.401 | |
样本 | 4713 | 4713 | 4713 | 4713 | 4713 | 4713 | |
T统计值 | 5.226*** | −2.658** | −4.2267*** | 0.621 | 2.198** | −3.742*** | |
p值 | (0.000) | (0.029) | (0.000) | (0.534) | (0.028) | (0.001) | |
Z统计值 | 2.291** | −2.513** | −10.861*** | 1.206 | 8.132*** | −8.270*** | |
p值 | (0.021) | (0.012) | (0.000) | (0.227) | (0.000) | (0.000) |