Abstract
Stability properties are defined for dynamic versions of macroeconomic policy models which can typically be represented by the fixed-target approach and the linear decision rules approach. More general procedures are considered from the viewpoint of systems control theory, and then the stability properties of optimal stabilization policies are investigated. In addition, we observe how the existence, uniqueness and stability in the policy decision models of the linear quadratic approach should be associated with the basic concepts of controllability, observability, stabilizability and detectability.
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