## Discuss implementing a steady_state_relation-block

Steady state finding in large economic models is hard. Currently, the user needs to manually implement a full steady state or reduce the problem and then call a solver. See e.g. https://forum.dynare.org/t/how-to-solve-steady-state-in-large-scale-dsge-models/12185/2
I wonder if it would be useful and feasible to introduce something like a `steady_state_relation`

-block that allows specifying analytical steady state relations that Dynare could use in the `_static`

-file to substitute out some variable and thus reduce the size of the problem (essentially introducing a model-local variable for the static model). An example would be

```
steady_state_relation;
u=1;
R=1/beta;
Pi=1;
i_nom=R*Pi;
I=delta*K;
end;
```

Combined with `initval`

this would make finding a steady state much easier.

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