topic Re: proc reg: model in SAS Procedures

proc reg: model

Emrys — Thu, 12 Mar 2015 11:14:41 GMT

I got a dataset (dataset2reg) that with several variables (var1--var10) and group variables, then i do the regression as following:

Regression A:

proc reg data=dataset2reg outest=result1 edf tableout;

eq1: model var0=var1 var2 var3 var4;

eq2: model var0=var5 var6 var7 var8;

eq3: model var0=var9 var10 var11 var12;

by group;

run;

quit;

Regression B:

proc reg data=dataset2reg outest=result1 edf tableout;

model var0=var1 var2 var3 var4;

by group;

run;

quit;

the result of eq1 of Regression A is different from Regression B, what's wrong with my regressions?

Re: proc reg: model

ballardw — Fri, 13 Mar 2015 16:11:36 GMT

Were the number of records used the same? I suspect that with 3 model statements in the first that if any of the variables var5 through var12 are missing then those records with any missing values were excluded for use in eq1.

Re: proc reg: model

data_null__ — Fri, 13 Mar 2015 16:27:29 GMT

No need to "SUSPECT" the behavior for missing values is documented.

The answer to the question is the same today as yesterday. https://communities.sas.com/thread/73103