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Use this tag only for regression models in which the response is a nonlinear function of the parameters. Do not use this tag for nonlinear data transformation; use [data-transformation] for that instead.

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Inclusion of Interaction terms when higher order polynomial effects are present

Suppose that there are 2 models, $y$ ~ $x_1+x_2+x_2^2+x_1:x_2+x_1:x_2^2$ $y$ ~ $x_1+x_2+x_2^2+x_1:x_2^2$ For both models, their adjusted $R^2$ values are the same and BIC values are similar with the …
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