Roger Newson wrote
> Somers' D and Kendall's tau-a are
> detailed in
> my Stata Journal paper (Newson, 2002), which is available in
> pre-publication draft form on my website. (As is my Stata tip about
> calculating geometric means using the -eform()- option of -regress-.)
>
> I hope this helps. I would be able to make more specific
> suggestions if I
> knew more about precisely what association Joseph is trying
> to measure.
>
> Newson R. Parameters behind "nonparametric" statistics:
> Kendall's tau,
> Somers' D and median differences. The Stata Journal 2002; 2(1): 45-64.
Roger's tip is the inaugural item in a new series of tips
published in the Stata Journal and is thus one of several
resources (articles, columns, book reviews, software updates,
etc.) available to subscribers to the Journal. For more
on the Journal, please see http://www.stata-journal.com.
Stata tips is a series of very concise notes about Stata commands,
features, or tricks that you may not yet have encountered.
We are specially keen to publish tips of practical value to a wide
range of users. A tip could concern statistics, data management,
graphics, or any other use of Stata. It may include advice on the
user interface or interacting with the operating system. Tips will not
include plugs for user-written programs, however smart or useful.
The first three tips, published in SJ 3(4) 2003, are
Stata tip 1: The eform() option of regress
Stata tip 2: Building with floors and ceilings
Stata tip 3: How to be assertive
Scheduled for the next issue, SJ 4(1) 2004, are
Stata tip 4: Using display as an on-line calculator
Stata tip 5: Ensuring programs preserve dataset sort order
Stata tip 6: Inserting awkward characters in the plot
Nick
[email protected]
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