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Re: st: Books on clustering


From   Joe Trubisz <jtrubisz@mac.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Books on clustering
Date   Tue, 3 Oct 2006 18:41:10 -0400

Ah...ok..now I understand.
I want to identify clusters, hence, I want to do cluster analysis.
I noticed a book called "Cluster Analysis" on the Stata site.
Would that be a good accompanying volume?

Joe


On Oct 3, 2006, at 4:48 PM, Michael Blasnik wrote:

...
No, they aren't the same. Cluster analysis is a statistical method (or methods) that seek to identify clusters in a dataset based on some measure of the distance between observations. In contrast, the analysis of clustered data (e.g., through the cluster() option in a Stata command) can arise a wide variety of problems and refers to known groupings in the data where often you are looking to adjust standard errors to account for the lack of independence in the observations within each group.

Michael Blasnik

----- Original Message ----- From: "Joe Trubisz" <jtrubisz@mac.com>
To: <statalist@hsphsun2.harvard.edu>
Sent: Tuesday, October 03, 2006 4:12 PM
Subject: Re: st: Books on clustering



OK...I plead ignorance here.
Isn't the 'analysis of clustered data' the same as 'cluster analysis'?

Joe
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