运用面板数据回归模型中,混合面板数据的R方为负值,但是固定效应模型和随机效应模型的R方均为正值。请各位高手给予指教。
总体样本城市的混合面板模型分析结果
Variable | Coefficient | Std. Error | t-Statistic | Prob. |
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CV? | 0.720170 | 1.274610 | 0.565012 | 0.5728 |
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| Weighted Statistics | | |
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R-squared | -311.427727 | Mean dependent var | 8.135536 |
Adjusted R-squared | -311.427727 | S.D. dependent var | 0.360142 |
S.E. of regression | 8.159344 | Sum squared resid | 11584.03 |
Durbin-Watson stat | 0.000380 | | | |