Thursday, June 3, 2010

Stata 11.1

Stata 11.1 was released today (type update all to update, and then help whatsnew to see what's new). Of particular note given the past couple of posts on this blog is the following:

  • Mixed models. Linear mixed (multilevel) models have new covariance structures for the residuals: exponential, banded, and Toeplitz. See xtmixed.

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