- New option `mh_tune_guess` for setting the initial value for `mh_tune_jscale` (!1717)
- New option `smoother_redux` to `estimation` and `calib_smoother` to trigger computing the Kalman smoother on a restricted state space instead of the full one (!1859)
- New block `filter_initial_state` for setting the initial condition of the Kalman filter/smoother (7c8f4867)
- New option `mh_initialize_from_previous_mcmc` to the `estimation` command that allows to pick initial values for a new MCMC from a previous one (!1841)