Research Article
A Combined Model of Global Cultivated Area Change and Prediction for Future: 1961–2020
Table 4
Prediction results of cubic curve model, the Gompertz model, and cyclic model.
| | Index | Overall sample (1961–2008) | Recent years (1991–2008) | | Cubic curve | Cyclic | Gompertz | Cubic curve | Cyclic | Gompertz |
| | MAPE | 2.76 | 3.67 | 7.89 | 2.53 | 6.22 | 11.13 | | TIC | 0.02 | 0.02 | 0.04 | 0.02 | 0.04 | 0.07 | | Bias proportion | 0.00 | 0.00 | 0.00 | 0.18 | 0.15 | 0.32 | | Variance proportion | 0.02 | 0.03 | 0.04 | 0.03 | 0.21 | 0.05 | | Covariance proportion | 0.98 | 0.97 | 0.96 | 0.79 | 0.63 | 0.62 |
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