| variable | meaning | variable | meaning |
| x1 | Residents’ disposable income | x9 | Young dependency ratio |
| x2 | GDP growth rate | x10 | Education situation |
| x3 | Inflation | x11 | Spending on social security |
| x4 | The first industrial output value | x12 | Employment figure |
| x5 | The tertiary industry output value | x13 | Income distribution gap |
| x6 | The annual fixed asset investment | x14 | Spending habits |
| x7 | The interest rate | x15 | Highway mileage |
| x8 | population | x16 | Post and telecommunications business |