Identifiability from parameter bounds. Structural and numerical aspects (Q762086)

Some a priori and a posteriori aspects of the identifiability problem for unidentifiable models are discussed. It is argued that the notion of identifiability from parameter bounds has a minor a priori structural relevance. The parameter bounds rationale may prove a useful a posteriori numerical notion. However, its practical potentiality needs careful evaluation, as the use of point estimates automatically builds into the model some hidden structural constraints. Examples are given.