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re: st: New command for clustering -clustpop-
From
"Airey, David C" <[email protected]>
To
"[email protected]" <[email protected]>
Subject
re: st: New command for clustering -clustpop-
Date
Thu, 21 Apr 2011 13:24:20 -0500
.
What do other software packages usually do with cluster analyses?
> Thanks to Kit Baum, a new command of interest to -cluster- users has
> been uploaded to ssc.
>
> Users of -cluster- are no doubt familiar that each run of the command
> on the same data produces different clustering.
>
> A run of cluster is, in effect, a sample (n=1) from the population of
> possible cluster groupings.
>
> -clustpop- expands the sample size by running -cluster- many times to
> estimate the population group assignments. The most frequent group
> assignment is taken as the estimate of the population and a
> statistical test of significance is performed to ensure the lower
> bound of the proportion is greater than 0.5. In other words, users
> can be confident, at a given alpha level, that this group assignment
> occurs for the majority of cases in the population. Cases which do no
> meet the criteria are set to missing.
>
> I expect that most users will prefer this method to using the
> -cluster- command alone.
>
> - Paul
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