Because it combine these two logit into one logit . Interpret parameter estimate just like they are under a single Logit model ,I guess.
Check the documentation. EQUALSLOPES does not force intercepts to be equal. The number of intercept parameters is determined by the numbe of levels of the response variable.
Are you fitting generalize logit regression or cumulative logit regression?
data class;
set sashelp.class end=last;
output;
if last then do;
sex='N';weight=34.5;height=123.4;output;
sex='N';weight=134.5;height=23.4;output;
sex='N';weight=74.5;height=223.4;output;
sex='N';weight=44.5;height=93.4;output;
end;
run;
proc logistic data=class;
model sex=weight height/link=glogit equalslopes;
run;
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