Multiple Imputation in SPSS 17.0

by Karen

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SPSS has just released a new version, 17.0. There are a number of new features, but the most major one for most researchers is that it now offers Multiple Imputation of Missing Values for both categorical and continuous variables.  This feature, however, is part of the Missing Values add-on module.  If your site license doesn’t have it, ask for it.  It’s worth it.

Multiple Imputation has been around as a technique for 10-15 years, but at first it was available only in specialized software such as Sudaan. One by one the major statistical packages have made it available, such as SAS and Splus. But SPSS users have been left behind until now.

If you’re not familiar with multiple imputation, it is one of a few modern techniques for dealing with missing data. All have the advantages of using the full sample size of the data set and creating unbiased parameter estimates. These are both huge improvements over traditional techniques for dealing with missing data, such as listwise deletion or single imputation.

For more information about multiple imputation and missing data, see the Missing Data section on our Articles page. Another great resource is Paul Allison’s book Missing Data.

The full list of new features in SPSS 17.0 is available at SPSS’s website, including feature comparisons across versions.

{ 2 comments… read them below or add one }

Gill November 21, 2011 at 12:37 am

I have spss 16.0 and i would like to do imputation on a data set do i need to buy the whole new versions to get that?
I tried to install what said it would take three minutes and it took 4 hours. what is going on? did i do the wrong download?

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Karen November 21, 2011 at 11:48 am

Hi Gill,

Unfortunately, I suspect you do need the whole new version. It’s part of the Missing Data add-on Module, but I doubt that you could use that v. 17 module on v. 16 base.

SPSS does have a two-week free trial (at least it did the last time I checked), so that might be the place to start.

There are also other options, like Amelia and NORM, which are free stand-alone MI packages. They’re nothing like SPSS, though.

As for how long it should install, I have no idea….

Karen

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