PRASCH: A Fortran Program for Latent Class Polytomous Response Rasch Models

Grego, J.M. , Lindsay, B.G. , & Clogg, C.C. (1993). A semiparametric random effects model for polytomous response data Manuscript submitted for publication.

Lindsay, B.G. (1983). The geometry of mixture likelihoods : A general theory. Annals of Statistics, ll, 783-792.

Lindsay, B.G. , Clogg, C.C. , & Grego, J.M. (1991). Semiparametric estimation in the Rasch model and related exponential response models, including a simple latent class model for item analysis. Journal of the American Statistical Association , 86, 96-107.