Saturday, April 01, 2017

SEM, identified, underidentified, overidentified model

If the number of unknowns is equal to the number of equations, the model is said to be just
identified.

If the number of unknowns is greater than the number of equations, the model is said to be underidentified, and there is no single solution possible.

An overidentified model is one in which there are fewer unknowns than equations.

In practice, overidentified models are preferred.

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