The ITSACORR method (Crosbie, 1993, 1995) is evaluated for the analysis of two-phase interrupted time-series designs. It is shown that each component of the ITSACORR framework (including the structural model, the design matrix, the autocorrelation estimator, the ultimate parameter estimation scheme, and the inferential method) contains fatal flaws.
Huitema, Bradley E.; McKean, Joseph W.; and Laraway, Sean
"Time-Series Intervention Analysis Using ITSACORR: Fatal Flaws,"
Journal of Modern Applied Statistical Methods: Vol. 6
, Article 4.
Available at: http://digitalcommons.wayne.edu/jmasm/vol6/iss2/4