These papers should be considered drafts.
Comments are welcome.
Our examination of Cho and Gaines analysis reveals that the instability they witness is a consequence of inconsistencies in their replication of Burden and Kimball's research. Our analysis shows that EI is stable, although we discover details of the statistical computation in the of the EI program that can substantively affect the accuracy of analysis. Fortunately for Burden and Kimball their strong results are not seriously affec ted. However, by checking the recommended EI diagnostics we find further eviden ce of model misspecification that must be addressed before accepting the validity of their results. We show that the computationally intensive methods in recent use are statistically and methodologically flawed, and extend Gelman and King's seats-vote method to incorporate voting precinct data.