annuncio seminario

[Elena Stanghellini <stanghel@stat.unipg.it>]

Il seguente seminario avra' luogo Lunedi' 25 ottobre alle
ore 15:00 presso il  Dipartimento di Scienze Statistiche
dell'Universita' di Perugia.

Tutti gli interessati sono invitati ad intervenire.


Speaker: Prof Peter van der Heijden, Universita' di Utrecht (NL).


Titolo: An extended study into the relationships between
correspondence analysis and latent class analysis


Riassunto:

Researchers dealing with frequency data nowadays can choose from a
vast range of methods, descriptive and inferential. Two such
well-known and useful methods are correspondence analysis and
latent class analysis. Although these two methods were initially used
for the different research objectives, they are mathematically related
to each other. Relations between these methods, however, have only
been reported in the literature regarding the bivariate case. In this
paper, we extend the study of such relations to the multivariate case. In
particular the multivariate (Lc) latent class model is shown to imply
the (relatively new) joint multivariate correspondence model
with (Lc-1) positive eigenvalues.
Such relations allow the underlying methods to be treated as variants
of the same conceptual idea, providing some new meaningful
aspects, which may help researchers better interpret the
findings of their investigation.



**********************************************
Elena Stanghellini 
Dipartimento di Scienze Statistiche
Via A. Pascoli - C.P. 1315 Succ. 1
06100 Perugia (Italy)

Tel +39 075 5855229 or 5855242
Fax +39 075 43242

email: stanghel@stat.unipg.it
**********************************************