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st: Stata 10 announcement


From   wgould@stata.com (William Gould, StataCorp LP)
To   statalist@hsphsun2.harvard.edu
Subject   st: Stata 10 announcement
Date   Mon, 04 Jun 2007 01:36:35 -0500

There is a long tradition of first announcing new releases of Stata on
Statalist.  Here it is:

         Stata 10 ships June 25.
 
         Orders are now being accepted by Stata and our distributors.
         Order from:
                 http://www.stata.com/
                 sales@stata.com
                 800-782-8272 (800-STATAPC, USA)
                 800-248-8272 (Canada)
            (+1) 979-696-4600 (Worldwide, voice)
            (+1) 979-696-4601 (Worldwide, FAX)

         More information is available at 
                 http://www.stata.com/stata10/

A new feature that will interest everyone is

    o  Stata's new WYSIWYG Graph Editor.  Point.  Click.  Edit.

Marketingwise, the Graph Editor may eclipse the other new features, but
we hope not.  Also of interest to everyone will be

    o  Date/time variables.  Stata already had date variables; now it 
       has time variables (and time-and-date variables, too).  Time is
       recorded with up to millisecond resolution, which will be 
       important to some of you.  Also, Stata's time variables will 
       work with or without leap-second adjustment.  You may never
       have heard about leap seconds, but there are clocks that are
       adjusted for them, and clocks that are not; in computer-
       generated datasets, time stamps come both ways.  Stata can work
       with either one.

    o  Estimation results may be saved to disk.  You type -estimates
       save <filename>- to save results and -estimates use <filename>-
       to use them.  When you use results, everything is just as it
       was, meaning that you can use any postestimation command, such
       as -test-, -predict-, and -nlcom-.

Statisticswise, Stata 10 includes 

     o  Exact logistic and Poisson regression.  These new estimators
        will be important to biostatisticians, those in related fields,
        and anyone who works with small datasets.  

     o  Multilevel, nested, hierarchical, and mixed-effects logistic
        and Poisson regression.  This is basically the equivalent of
        Stata 9's -xtmixed-, but for binary and count responses.

     o  More estimators for dynamic panel-data models, including the
        Arellano-Bover/Blundell-Bond system estimator and its
        generalizations.  Economists, take note.

     o  LIML and GMM regression in addition to 2SLS, including a test
        for weak instruments.  (LIML stands for Limited Information
        Maximum Likelihood and GMM stands for Generalized Method of
        Moments.)

     o  Nonlinear, seemingly unrelated regression.

     o  More survey estimators, including Cox proportional hazards
        regression for survey data.  As for the rest, Stata 10 includes
        27 more survey estimator.  Stata 9 had 21 estimators.  We have
        more than doubled what is available.

     o  Discriminant analysis, including linear, quadratic, and
        kth-nearest neighbor.

     o  Multiple correspondence analysis (MCA) and joint correspondence 
        analysis (JCA).

     o  Sample-size and power calculations for survival studies.

There's lots more -- about 21 pages -- visit 
http://www.stata.com/stata10/ for the complete list.


NOTES

    1.  You know that we recently released Stata/MP, Stata for 
        multiprocessor computers, including dual-core CPUs.  Two
        CPUs or cores do not double performance, but Stata/MP
        achieves 72% efficiency; see http://www.stata.com/statamp/.
        For Stata 10, even more is parallelized.  If you don't
        have Stata/MP, you can upgrade to it when upgrading to Stata 10.

    2.  Because of the new time variables, Stata's .dta dataset format
        has changed.  This happens periodically and, because Stata
        always reads old-format datasets, most users don't care or even
        notice.  It does mean, however, that if you use Stat/Transfer,
        you will want to upgrade to Stat/Transfer 9 [sic].  Yes, it's
        confusing:  Stat/Transfer 9 goes with Stata 10.


-- Bill (for the entire Stata 10 development team)
   wgould@stata.com

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