looks right, but your model seem to have problem.
You modeled the 2nd level by a random intercept and slopes. The slopes are essentially 0, means there is no different random effect by inco_s and gdp within the same id. The variables inco_s and gdp may have problem, if not, you can simply model the 2nd level by a random intercept.
You could estimate the p-value, but it may not help much, si ...
You modeled the 2nd level by a random intercept and slopes. The slopes are essentially 0, means there is no different random effect by inco_s and gdp within the same id. The variables inco_s and gdp may have problem, if not, you can simply model the 2nd level by a random intercept.
You could estimate the p-value, but it may not help much, since the 2nd level is about the sd, the p-value can only be used to test sd=1.
After making your model correct, use predict with different option to request what you want.