变量 | OLS | TOP25% | 随机效应模型 | |||
(1) Ln销售量 | (2) Ln销售额 | (3) Ln销售量 | (4) Ln销售额 | (5) Ln销售量 | (6) Ln销售额 | |
Treat × Period | 1.565*** | 2.530*** | 1.523*** | 2.453*** | 0.810*** | 1.243*** |
(0.125) | (0.207) | (1.444) | (0.232) | (0.114) | (0.187) | |
Treat × Period × Popularity | 0.790*** | 1.447*** | 0.677*** | 1.238*** | 0.790*** | 1.448*** |
(0.154) | (0.253) | (0.168) | (0.267) | (0.161) | (0.265) | |
价格 | −0.006 | −0.001 | −0.001 | 0.009 | −0.004 | −0.002 |
(0.008) | (0.014) | (0.008) | (0.013) | (0.002) | (0.003) | |
折扣 | 0.980 | −1.882 | 0.346 | −3.042 | 3.604** | 1.980 |
(1.810) | (2.985) | (1.813) | (2.761) | (1.131) | (1.850) | |
常数项 | 3.430 | 5.257 | 2.115 | 3.638 | 2.573*** | 5.286*** |
(1.762) | (2.906) | (1.255) | (1.944) | (0.456) | (0.729) | |
产品固定效应 | 是 | 是 | 是 | 是 | 否 | 否 |
时间固定效应 | 是 | 是 | 是 | 是 | 否 | 否 |
观测值 | 11,650 | 11,650 | 11,650 | 11,650 | 11,650 | 11,650 |