| 系数 | 标准偏差 | | 底价 | | BIN | 125.448*** | (5.470) | | FP | 155.371*** | (3.123) | | SHIPCOST | -1.225*** | (0.307) | | POSFB | -36.566** | (17.808) | | RETURN | 29.521*** | (4.185) | | CONSTANT | 40.000** | (18.185) | | 样本选择式(selection equation) | | EXPER | 0.001*** | (0.0003) | | INVENTORY | -0.010*** | (0.003) | | SHIPCOST | 0.006 | (0.030) | | POSFB | -20.834* | (12.560) | | RETURN | -0.023 | (0.432) | | POSTDUR | 0.341*** | (0.089) | | CONSTANT | 19.634 | (12.052) | | BIN | | EXPER | -0.0003** | (0.0001) | | INVENTORY | 0.003 | (0.004) | | SHIPCOST | 0.0001 | (0.014) | | POSFB | -0.009 | (0.638) | | RETURN | -0.003 | (0.228) | | CONSTANT | 0.018 | (1.307) | | FP | | EXPER | -0.0003 | (0.0002) | | INVENTORY | 0.015** | (0.007) | | SHIPCOST | 0.016 | (0.026) | | POSFB | 13.177 | (8.679) | | RETURN | 0.186 | (0.363) | | CONSTANT | -14.537* | (8.628) | | $ \sigma_1 $ | 12.026*** | (0.640) | | $ \sigma_4 $ | 3.031*** | (0.579) | | $ \rho_{12} $ | 0.583*** | (0.120) | | $ \rho_{13} $ | -0.139** | (0.040) | | $ \rho_{14} $ | -0.068*** | (0.014) | | $ \rho_{23} $ | 0.267 | (0.247) | | $ \rho_{24} $ | 0.085 | (0.138) | | $ \rho_{34} $ | 0.883*** | (0.027) | | 样本数 | 1186 | |
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