Hello people,

I need some help with LDA, I have important home work to do and I have a problem.

I got autocorrelation of a model:

(obs=70)
| yres3 yres4 yres5 yres6 yres7 yres8
-------------+------------------------------------------------------
yres3 | 1.0000
yres4 | 0.7737 1.0000
yres5 | 0.5208 0.8011 1.0000
yres6 | 0.0621 0.3431 0.6644 1.0000
yres7 | -0.3184 0.0326 0.4052 0.8227 1.0000
yres8 | -0.4073 -0.0458 0.3589 0.7924 0.9219 1.0000

I need to determine the structure of it, now in my opinion it has an unstructured structure, but when I try to run a GEE model in STATA, is does it, but I get a message that the model can't converge ( and that's bad ! ).
All the other structures ( AR1, EXCH, Independent ) does not fit this matrix.

What should I do ??

thanks !