st: Stata 5 version of -somersd- on my website

[Roger Newson <roger.newson@kcl.ac.uk>]

Hello All

Just in case there are still any Stata 5 users out there, I have now placed 
on my website the old Stata 5 version of the -somersd- package. The Stata 6 
version of -somersd- (the latest) is of course still available, both on my 
website and on SSC. The Stata 5 and Stata 6 versions are described as below 
on my website. The Stata 5 version is very primitive, and was the first 
program I shared with the Stata community via Statalist, with .ado files 
dated 1997 and a .hlp file dated 1998. Any further improvements to the 
package will probably require plugins. More about the -somersd- package can 
be found in Newson (2002), which can also be downloaded as a 
pre-publication draft from my website.

Best wishes

Roger

References

Newson R. Parameters behind "nonparametric" statistics: Kendall's tau, 
Somers' D and median differences. The Stata Journal 2002; 2(1): 45-64. 
Pre-publication draft downloadable from
http://www.kcl-phs.org.uk/rogernewson/
using either a browser or the Stata -net- command.

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package somersd from http://www.kcl-phs.org.uk/rogernewson/stata5
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TITLE
      somersd: Confidence intervals for Somers' D and Kendall's tau-a

DESCRIPTION/AUTHOR(S)
      Roger Newson, King's College London, UK
      somersd calculates values of Somers' D or Kendall's tau-a for the first
      variable of varlist as a predictor of each of the other variables in 
varlist,
      with estimates and jackknife variances stored as estimation output.

      Author: Roger Newson
      Distribution-date: 24 March 2004
      Stata-version: 5

      Note: This is a superseded version of somersd for users with Stata 
Version 5.
      The most recent version of somersd can usually be downloaded from this
      website using the Stata -net- command, or from SSC using the Stata 
command:
      ssc install somersd

INSTALLATION FILES                                  (click here to install)
      somersd.ado
      somersd.hlp
      tidot.ado
      ujack.ado
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(click here to return to the previous screen)

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package somersd from http://www.kcl-phs.org.uk/rogernewson/stata6
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TITLE
      somersd: Kendall's tau-a, Somers' D and median differences

DESCRIPTION/AUTHOR(S)
      The somersd package contains the programs somersd and cendif, which
      calculate confidence intervals for the parameters behind rank or
      "nonparametric" statistics. The program somersd calculates confidence
      intervals for Kendall's tau-a or Somers' D, and stores the estimates and
      their covariance matrix as estimation results. The program cendif 
calculates
      confidence intervals for Hodges-Lehmann median differences (or other
      percentile differences) between two groups. Kendall's tau-a is a 
difference
      between probabilities of concordance and discordance, and measures rank
      order correlation. Somers' D is a parameter equal to zero under the null
      hypothesis tested by the Wilcoxon or Mann-Whitney ranksum test, and 
can be
      used to calculate confidence intervals for areas under receiver 
operating
      characteristic (ROC) curves and differences between those areas. The
      Hodges-Lehmann median difference can be defined in terms of Somers' 
D, and
      is also zero under the null hypothesis tested by the ranksum test.
      Full documentation of the two programs (including methods and formulas)
      can be found in the ancillary files somersd.pdf and cendif.pdf, 
which can
      be viewed using the Adobe Acrobat Reader.

      Author: Roger Newson
      Distribution-date: 29 May 2003
      Stata-version: 6


INSTALLATION FILES                                  (click here to install)
      somersd.ado
      somersd.hlp
      somers_p.ado
      cendif.ado
      cendif.hlp

ANCILLARY FILES                                     (click here to get)
      somersd.pdf
      cendif.pdf
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(click here to return to the previous screen)


--
Roger Newson
Lecturer in Medical Statistics
Department of Public Health Sciences
King's College London
5th Floor, Capital House
42 Weston Street
London SE1 3QD
United Kingdom

Tel: 020 7848 6648 International +44 20 7848 6648
Fax: 020 7848 6620 International +44 20 7848 6620
  or 020 7848 6605 International +44 20 7848 6605
Email: roger.newson@kcl.ac.uk
Website: http://www.kcl-phs.org.uk/rogernewson

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

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