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DOUBLE MINIMIZATION FOR LOGIT MODELS WITH AN ADDITIVE
TWO FACTORS STRUCTURE


Ines Jorge Sequeira1, Joao Tiago Mexia1, Sandra Nunes2

1Department of Mathematics, Faculty of Science and Technology, New University of Lisbon, Quinta da Torre 2829-516 Caparica, Portugal, e-mail: ijs@fct.unl.pt
2Department of Mathematics, EST/IPS, Campus do IPS, Estefanilh, 2910 761 Setúbal, Portugal, e-mail: snunes@est.ips.pt


Logit models may be used to express the incidence rate of diseases when the impact depends on two, or more, additive factors. A double minimization algorithm is presented for the adjustment of such models for the case of two additive factors. An application to the incidences of Tuberculosis and AIDS is presented.


Logit models, double minimization algorithm