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How do I run a combined Box-Cox-Box-Tidwell regression?

asked 2015-02-21 05:03:09 +0000

Tolu gravatar image

updated 2015-02-24 23:43:31 +0000

I need some advice on how to go about executing a combined Box-Cox-Box-Tidwell regression for an equation in which there are about 8 independent variables. Of these, 4 are continuous variables while the remainder are dummy variables. Is there a way to run this regression such that only the dependent variable and the RHS continuous variables are transformed? What is the command?

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answered 2015-02-24 22:47:41 +0000

This can be done using restrictions which can be placed using the RESTRICT and/or LAMBDA option on the command. Note that to avoid transforming zeros you could use 1 and 2 for dummies rather than 0 and 1. With binary variables it does not really matter what 2 values are used as long as you know how they are coded.

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Thanks for your response. I am trying to use the FULL option but page 175 of the reference manual says the RESTRICT and LAMBDA options are not available with that option. However, I will try coding my dummies as 1 and 2.

Tolu gravatar imageTolu ( 2015-02-24 23:23:23 +0000 )edit

That is correct. Restrictions are not allowed with Full or Tidwell options.

SHAZAMHelp gravatar imageSHAZAMHelp ( 2015-02-24 23:54:15 +0000 )edit
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Asked: 2015-02-21 05:03:09 +0000

Seen: 1,423 times

Last updated: Feb 24 '15