st: New version of -somersd- on SSC

[Roger Newson <r.newson@imperial.ac.uk>]

Thanks to Kit Baum, a new version of the -somersd- package (described as 
below on my website) is now available for download from SSC. In Stata, 
use the -ssc- command to to this, or -adoupdate- if you already have an 
old version.

The -somersd- package is described as below on my website. The new 
version fixes a bug, which caused observations with missing values for 
-cluster()- variables to be included in the analysis (belonging to 
clusters corresponding to these missing values). In the new version, 
observations with missing values for -cluster()- variables are excluded 
from the analysis, in accordance with normal Stata practice. I would 
like to thank Garry Anderson for alerting me to this bug.

Best wishes

Roger


--
Roger B Newson BSc MSc DPhil
Lecturer in Medical Statistics
Respiratory Epidemiology and Public Health Group
National Heart and Lung Institute
Imperial College London
Royal Brompton Campus
Room 33, Emmanuel Kaye Building
1B Manresa Road
London SW3 6LR
UNITED KINGDOM
Tel: +44 (0)20 7352 8121 ext 3381
Fax: +44 (0)20 7351 8322
Email: r.newson@imperial.ac.uk
Web page: http://www.imperial.ac.uk/nhli/r.newson/
Departmental Web page:
http://www1.imperial.ac.uk/medicine/about/divisions/nhli/respiration/popgenetics/reph/

Opinions expressed are those of the author, not of the institution.

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package somersd from http://www.imperial.ac.uk/nhli/r.newson/stata10
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TITLE
      somersd: Kendall's tau-a, Somers' D and percentile slopes

DESCRIPTION/AUTHOR(S)
      The somersd package contains the programs somersd, censlope and 
cendif,
      which calculate confidence intervals for a range of parameters behind
      rank or "nonparametric" statistics. somersd calculates confidence
      intervals for generalized Kendall's tau-a or Somers' D parameters,
      and stores the estimates and their covariance matrix as 
estimation results.
      It can be used on left-censored, right-censored, clustered and/or
      stratified data. censlope is an extended version of somersd, 
which also
      calculates confidence limits for the generalized Theil-Sen median 
slopes
      (or other percentile slopes) corresponding to the version of 
Somers' D
      or Kendall's tau-a estimated. cendif is an easy-to-use program to
      calculate confidence intervals for Hodges-Lehmann median differences
      (or other percentile differences) between two groups. The somersd 
package
      can be used to calculate confidence intervals for a wide range of
      rank-based parameters, which are special cases of Kendall's tau-a,
      Somers' D or percentile slopes. These parameters include differences
      between proportions, Harrell's c index, areas under receiver 
operating
      characteristic (ROC) curves, differences between Harrell's c 
indices or
      ROC areas, Gini coefficients, population attributable risks, median
      differences, ratios, slopes and per-unit ratios, and the parameters
      behind the sign test and the Wilcoxon-Mann-Whitney or Breslow-Gehan
      ranksum tests. Full documentation of the programs (including 
methods and
      formulas) can be found in the manual files somersd.pdf, 
censlope.pdf and
      cendif.pdf, which can be viewed using the Adobe Acrobat Reader.

      Author: Roger Newson
      Distribution-date: 13July2010
      Stata-version: 10


INSTALLATION FILES                                  (click here to install)
      cendif.ado
      censlope.ado
      somers_p.ado
      somersd.ado
      _bcsf_bisect.mata
      _bcsf_bracketing.mata
      _bcsf_regula.mata
      _bcsf_ridders.mata
      _blncdtree.mata
      _somdtransf.mata
      _u2jackpseud.mata
      _v2jackpseud.mata
      blncdtree.mata
      tidot.mata
      tidottree.mata
      lsomersd.mlib
      cendif.sthlp
      censlope.sthlp
      censlope_iteration.sthlp
      mf_bcsf_bracketing.sthlp
      mf_blncdtree.sthlp
      mf_somdtransf.sthlp
      mf_u2jackpseud.sthlp
      somersd.sthlp
      somersd_mata.sthlp

ANCILLARY FILES                                     (click here to get)
      cendif.pdf
      censlope.pdf
      somersd.pdf
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