| Category | Model | Δlnx | Δlnx (−1) | Δlnx2 | Δlnx2 (−1) | Ecm (−1) |
| First class city | ARDL (1.0) | 0.461*** |
|
|
| −1.206** |
| Second class city | ARDL (1.2) | −0.59 | 32.23* | 3.148* | −1.36 | −1.83*** |