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Posted 09-10-2018 07:05 AM
(3617 views)

Can I estimate the marginal contribution of each variable in logistic regression by * Standardized Estimate*, received in

Can I calculate marginal contribution of variables by other options or formula?

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I don't think the concept of marginal contribution of a variable in a regression model exists. When your x-variables are correlated with one another, they don't split up the sum of squares of the model uniquely or independently. The effect of a term in the model changes as other terms are added or removed from the model, and so there isn't even a unique effect of each term (exception: if your X-matrix is orthogonal then there is a unique effect of each term).

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Paige Miller

Paige Miller

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I don't think the concept of marginal contribution of a variable in a regression model exists. When your x-variables are correlated with one another, they don't split up the sum of squares of the model uniquely or independently. The effect of a term in the model changes as other terms are added or removed from the model, and so there isn't even a unique effect of each term (exception: if your X-matrix is orthogonal then there is a unique effect of each term).

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Paige Miller

Paige Miller

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Thank you for the answer. Did you know the simple explanation of the Standardized Estimate in the logistic regression model?

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From the documentation at https://documentation.sas.com/?cdcId=pgmmvacdc&cdcVersion=9.4&docsetId=statug&docsetTarget=statug_lo...

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Paige Miller

Paige Miller

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- Tags:
- Variable Importance

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