Yen, Amy Ming-Fang; Chen, Tony Hsiu-Hsi - In: Journal of Applied Statistics 34 (2007) 1, pp. 11-21
Although heterogeneity across individuals may be reduced when a two-state process is extended into a multi-state process, the discrepancy between the observed and the predicted for some states may still exist owing to two possibilities, unobserved mixture distribution in the initial state and...