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FUZZY ECONOMIC REVIEW

ISSN (print) 1136-0593 · ISSN (online) 2445-4192

Volume III, number 2. November 1998

Possibilistic data analysis and its application to portfolio selection problems

Peijun Guo, Hideo Tanaka. Osaka Prefecture University

In this paper, possibility distributions are identified from the given data and associated possibility grades for reflecting some specific knowledge. This method is used to obtain upper and lower possibility distributions from the given security data to reflect two extreme opinions in portfolio selection problems. Portfolio selection problems based on…
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Fuzzy logic in vendor rating: a comparison between a fuzzy logic system and a neural network

V. Albino, A. C. Garavelli. Università della Basilicata, Potenza

M. Gorgoglione. Politecnico di Bari

In the industrial environment, more stable and cooperative supply relationships require the rating and the selection of suppliers. Usually, this important and complex decision is made by experts. Due to the uncertainty and the non-linearity of the behavior of the experts involved in this decision-making process, the fuzzy logic seems…
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Flexible estimation of cost functions based on fuzzy logic modeling approach

Vasile Georgescu. University of Craiova

Economists currently deal with the modeling of nonlinear processes, having complex structure and large dimensionality. The traditional modeling methods, such as nonlinear regression analysis, generally fail in providing appropriate solutions to this problem, especially in the cases when the functional form of the model is unknown and has to be…
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Analysis of uncertainty

D. Ramírez. University of Barcelona

The object of this paper is to give some guidance concerning the methodological treatment of uncertainty. With this aim in mind, given that the notion of uncertainty is highly complex, I will present, in the form of an adequately developed and analysed argument, the framework that allows us to distinguish…
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