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st: stcox, strata() : time series operators not allowed

From   "David T. Hamilton" <[email protected]>
To   [email protected]
Subject   st: stcox, strata() : time series operators not allowed
Date   Mon, 28 Mar 2005 22:04:54 -0500

Dear Statalisters:

I'm running what would seem to be a straightforward stratified stcox
regression, but I get the error message "time series operators not
allowed" when I include the strata() option.

The strata variable I'm using is not time-varying, but is coded with
values 0, 1, 2, 3. (I can run the regression if treat the variable as
categorical rather than stratified.) I do have other time-varying
variables in the model.

My date0 and date1 variables are coded as time values, but that
shouldn't matter right?

Any insight on this error message is appreciated.

Thanks in advance.

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