carried out so that the {xij} may be treated as ...

Tij --= log (Pij) -log (l- Pii) and assume uij + , + /,i (1.1) and estimate the parameters ,u, {oil and {fl,J} by maximum likelihood. This does produce estimates with smaller standard errors, but the global patterns imposed by the assumptions may not be valid. In this paper we propose a compromise between the two methods described above. ................
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