PROC GEE (or proc GENMOD) does not converge

niam — Fri, 01 Mar 2019 18:51:51 GMT

Hi I have a binary outcome variable and a binary predictor. Observations are grouped at DRIVERID level.

When I run the model with using DIST=BIN and LINK=LOGIT, the model does not converge, however, if I just run the model without these two options, the model runs and gives me results.

Can you please let me know why the model fails to converge when I specify that the DV is binary?

The following model runs:

proc gee data=ANALYSIS2 descend;
   class  DRIVERID ;
   model effct=TREATMENT ;
   repeated  subject=DRIVERID  / CORR=IND;
run;

This one does not run:

proc gee data=ANALYSIS2 descend;
   class  DRIVERID ;
   model effect=TREATMENT /dist=bin link=logit;
   repeated  subject=DRIVERID  / CORR=IND;
run;

Here is the error message I get:

The generalized Hessian matrix is not positive definite. Iteration will be terminated.

Re: PROC GEE (or proc GENMOD) does not converge

niam — Sun, 03 Mar 2019 18:32:08 GMT

Hi All, any help will be greatly appreciated

topic PROC GEE (or proc GENMOD) does not converge in New SAS User

PROC GEE (or proc GENMOD) does not converge

Re: PROC GEE (or proc GENMOD) does not converge

Re: PROC GEE (or proc GENMOD) does not converge