| 变量 | 全部样本 | 沪深港通标的 | 非沪深港通标的 |
| EFD | 0.001*** (8.511) | 0.000311 (1.853) | 0.001*** (6.772) |
| ROA | 0.991*** (978.449) | 0.838*** (125.681) | 0.993*** (971.050) |
| Lev | −0.003 (−1.498) | 0.013 (1.366) | −0.004 (−1.623) |
| Comp | −0.005*** (−6.668) | −2.444E−5 (−0.014) | −0.005*** (−5.717) |
| Size | 0.005*** (8.667) | 0.003 (1.592) | 0.005*** (8.326) |
| Invent | 0.011* (2.127) | −0.017 (−1.133) | 0.011* (2.020) |
| SA | −0.005 (−1.695) | −0.004 (−0.596) | −0.005 (−1.906) |
| Observations | 19111 | 2732 | 16379 |
| R-squared | 0.987 | 0.874 | 0.989 |