3-level GENMOD Exchangeable working correlations

halladje — Sat, 23 Nov 2019 17:46:36 GMT

Hello,

I am trying to estimate the exchangeable working correlation for classroom and school clustering in a 3-level model.

I can estimate the ICC using GLIMMIX, however, I am wondering if it is possible to estimate a 3-level model using GENMOD as well?

Currently, my two level model is producing an exchnageable working correlation with the folloiwng code:

proc genmod daya=sel;

class schoolid sel;

model sel (ref=first)=/D=B link=logit;

repeated subject schoolid/type=exch covb;

run;

When I try to add in a third level, the following code works but only provides one exchangeable working correlation. Is there a way to separate the class from the school exchangeable working correlation in GENMOD? If so, how do I fix the following code?

proc genmod daya=sel;

class schoolid classid sel;

model sel (ref=first)=/D=B link=logit;

repeated subject schoolid/type=exch covb;

repeated subject classid(schoolids)/type=exch covb;

run;

Thanks in advance!

Re: 3-level GENMOD Exchangeable working correlations

StatDave — Mon, 25 Nov 2019 19:37:54 GMT

GENMOD does not estimate multilevel models. Only one REPEATED statement is allowed.

topic 3-level GENMOD Exchangeable working correlations in Statistical Procedures

3-level GENMOD Exchangeable working correlations

Re: 3-level GENMOD Exchangeable working correlations