I believe it means your variables are linear combinations of one another (that you're
suffering from multicollinearity).
From: gov2001-l-bounces at
lists.fas.harvard.edu [mailto:gov2001-l-bounces at
lists.fas.harvard.edu] On Behalf Of Lin, Eric
Sent: Tuesday, April 20, 2010 9:35 PM
To: Class List for Gov 2001/E-2001
Subject: [gov2001] singularity
When you get an error message after summarizing a regression model that says:
Coefficients: (14 not defined because of singularities)
What does that mean, exactly?
thanks!!
--
ERIC LIN
Technology and Operations Management
Harvard Business School
Boston, MA 02163
elin at
hbs.edu