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Model Design – Desired and Undesired Model Characteristics and Effects

Excerpt

The user will choose a model functional form, its architecture. Perhaps it will have been derived from first principles and left in its primitive form, or converted into dimensionless group variables, or scaled variables by range or by standard deviation, or rearranged for computational convenience. Such rearrangements may have an impact on the ability or efficiency in seeking coefficient values.

13.1Introduction
13.2Redundant Coefficients
13.3Coefficient Correlation
13.4Asymptotic and Uncertainty Effects When Model is Inverted
13.5Irrelevant Coefficients
13.6Poles and Sign Flips w.r.t. the DV
13.7Too Many Adjustable Coefficients or Too Many Regressors
13.8Irrelevant Model Coefficients
13.9Scale-Up or Scale-Down Transition to New Phenomena
13.10Takeaway
Exercises
Topics: Design

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