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st: difference between "Spearman" and "pwcorr / correlate"

From   Ashwin Ananthakrishnan <>
Subject   st: difference between "Spearman" and "pwcorr / correlate"
Date   Tue, 6 Oct 2009 17:31:52 -0700 (PDT)


In examining the correlation between two variables, what is the difference in utility of the Spearman correlation co-efficient (stata command 'spearman') and the Pearson correlation co-efficient (stata command "pwcorr" or "correlate")?

Is there a situation where one is more applicable than the other? What does it mean if the correlation is significant with one but not the other?



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