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Simple test for non-stationarity.
| Parameters | 2* S.E. (Global) | Inter-quartile range (Local) | Stationary or non-stationary variable |
|---|---|---|---|
| Intercept | 0.06 | 0.46 | Non-stationary |
| Proportion of lower social grade (G4 + G5) population | 0.18 | 1.05 | Non-stationary |
