Regions | S1 | S2 | S3 | F2 | F3 | Conclusions |
China | 0.24432 | 2.67645 | 11.63396 | 2.062182 | 8.047626 | Variable coefficient model |
The east | 0.11198 | 0.74967 | 3.68426 | 1.264505 | 5.901351 | Variable intercept model |
The central | 0.02545 | 0.27442 | 0.22994 | 2.276571 | 1.554286 | Constant coefficient model |
The west | 0.10823 | 0.8668 | 2.54523 | 1.531852 | 4.128395 | Variable intercept model |