Restrict statement

[scott.raynaud]

I have a survey question that was given to all ages from 1997-99.  From 2000-11 it was only given to those aged 1 or greater.  I want to impute values for the entire set, 1997-2011.  How can I write a restrict statement that takes into account this skip pattern?  If I say x(age>=1), then I'll miss some missing values for the period 1997-99.  If I omit the restrict statement, then I'll be imputing values for 2000-11 that were intentionally left blank since they were less than one year of age.

[John Van Hoewyk]

Scott,

You need to create an indicator variable that takes  in account the conditions you describe. I think this SAS code will work.

S=0;
IF SURVEY <2000 THEN S=1;
IF SURVEY >=2000 AND AGE >=1 THEN S=1;

THEN USE THE FOLLOWING RESTRICT STATEMENT:

RESTRICT X(S=1);


john

On 8/12/2015 9:44 AM, scott.raynaud wrote:

I have a survey question that was given to all ages from 1997-99.  From 2000-11 it was only given to those aged 1 or greater.  I want to impute values for the entire set, 1997-2011.  How can I write a restrict statement that takes into account this skip pattern?  If I say x(age>=1), then I'll miss some missing values for the period 1997-99.  If I omit the restrict statement, then I'll be imputing values for 2000-11 that were intentionally left blank since they were less than one year of age.

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[Trivellore Raghunathan]

I think you should include S as a transfer variable as you dont want to use it as a predictor.

Raghu

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Trivellore Raghunathan (Raghu)

Director, Survey Research Center

Research Professor, Institute for Social Research

Professor, Department of Biostatistics

University of Michigan

Phone: (734)-764-8365

Fax: (734)-763-9831

"A good life is filled with selfless actions full of compassion knowing well that we are all one"

[Scott Raynaud]

Exactly what I did.  Thanks for the tips.