变量 | 实验组企业 | 对照组企业 | ||
均值 | 标准差 | 均值 | 标准差 | |
Value | 0.3658 | 0.2364 | 0.3608 | 0.4890 |
Invest | 0.0689 | 0.0626 | 0.0508 | 0.0415 |
Size | 24.2540 | 1.7007 | 22.9604 | 1.6564 |
Lev | 0.5931 | 0.1980 | 0.4706 | 0.1863 |
Cash | −0.0013 | 0.0320 | −0.0109 | 0.0724 |
Board | 2.2642 | 0.2180 | 2.2515 | 0.2131 |
Ins | 0.0843 | 0.1499 | 0.0617 | 0.0978 |