Abstract—The credit scoring risk management is a fast growing
field due to consumer’s credit requests. Credit requests,
of new and existing customers, are often evaluated by classical
discrimination rules based on customers information. However,
these kinds of strategies have serious limits and don’t take into
account the characteristics difference between current customers
and the future ones. The aim of this paper is to measure credit
worthiness for non customers borrowers and to model potential
risk given a heterogeneous population formed by borrowers
customers of the bank and others who are not. We hold on
previous works done in generalized discrimination and transpose
them into the logistic model to bring out efficient discrimination
rules for non customers’ subpopulation. Therefore we obtain
seven simple models of connection between parameters of both
logistic models associated respectively to the two subpopulations.
The German credit data set is selected as the experimental data
to compare the seven models. Experimental results show that
the use of links between the two subpopulations improve the
classification accuracy for the new loan applicants.
Index Terms—Logistic model, Gaussian discrimination, Subpopulation
links, Credit scoring, Subpopulations mixture