Cluster Headache Early Signs Clustered or grouped errors are errors that are correlated within a cluster or group and are uncorrelated across clusters A simple example of clustering arises when sampling is of independent units but errors for individuals within the unit are correlated
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Cluster Headache Early Signs
Cluster Headache Early Signs
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Stata stata reg vce cluster id cluster Petersen 2009 Stata
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Fe robust fe cluster xtreg fe robustxtreg fe cluster Vce vcetype vcetype robust cluster fvvarlist Reporting eform irr eform display options Diagnostic and undocumented
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Clustered or grouped errors are errors that are correlated within a cluster or group and are uncorrelated across clusters A simple example of clustering arises when sampling is of independent units but errors for individuals within the unit are correlated
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Cluster Headache Early Signs - Stata stata reg vce cluster id
