Graphing confidence ellipses: An update of ellip for Stata 8

Anders Alexandersson
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Anders Alexandersson: Mississippi State University

Stata Journal, 2004, vol. 4, issue 3, 242-256

Abstract: This paper describes an update of the ellip command for graphing confidence ellipses in Stata 8. Two of the most notable new features are the option to graph confidence ellipses around variable means and the ability to add inscribed lines. These features allow a geometric characterization of linear regression with unequal error variances, as in McCartin (2003). Copyright 2004 by StataCorp LP.

Keywords: ellip; confidence ellipse; error-variance regression; elliptical distribution (search for similar items in EconPapers)
Date: 2004
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