Measurement and Fuzzy Scales

Concept measurement presents several difficulties and the tools used to collect qualitative ordinal variables are not always satisfactory. The Likert scale is examined in the context of student evaluation of teaching activity and the measurement approach considers the possibility to apply the fuzzy inference system method to obtain individual values being near the reality and coherent with the prescriptions of the measurement process. The paper presents the results of a survey carried out in the Faculty of Economics at the University of Modena and Reggio Emilia to ascertain the differences between two scales (options): one proposed by the Italian Committee for University System Evaluation (Comitato nazionale per la valutazione del sistema universitario) and another one corresponding to the traditional marks used in the evaluation of student performances in the schools attended before the university (mark scale). The results showed that the latter seemed more coherent with the score (in the decimal scale) assigned to the modalities of the scale

The interaction between parents and children as a relevant dimension of child well being. The case of Italy

This paper aims at measuring the functionings of social interaction, a relevant dimension in the description and conceptualisation of child well being by using the capability approach. In this paper we deal with a special dimension of this capability that involves the capability of interaction between parents and child. We propose a fuzzy expert system to measure this capability. To apply the model we use a data set based on a matched data source of ISTAT (Italian National Statistical Office 1998) multipurpose survey on family and on children condition in Italy to recover information on children’s education, the socio-demographic structure of their families, child care provided by relatives and parents according to the type of activities in which the children are involved and Bank of Italy Survey on household income and wealth year 2000 (SHIW00). This is a first step of a more complex system allowing for a richer set of indicators on capabilities in order to measure child well being.

The Interaction between Parents and Children as a Relevant Dimension of Child Well Being. The Case of Italy

This paper aims at measuring the functionings of social interaction, a relevant dimension in the description and conceptualisation of child well being by using the capability approach. In this paper we deal with a special dimension of this capability that involves the capability of interaction between parents and child. We propose a fuzzy expert system to measure this capability. To apply the model we use a data set based on a matched data source of ISTAT (Italian National Statistical Office 1998) multipurpose survey on family and on children condition in Italy to recover information on children’s education, the socio-demographic structure of their families, child care provided by relatives and parents according to the type of activities in which the children are involved and Bank of Italy Survey on household income and wealth year 2000 (SHIW00). This is a first step of a more complex system allowing for a richer set of indicators on capabilities in order to measure child well being.Child Well Being, Fuzzy Expert System, Capabilities

Evaluation and interval approximation of fuzzy quantities

In this paper we present a general framework to face the problem of evaluate fuzzy quantities. A fuzzy quantity is a fuzzy set that may be non normal and/or non convex. This new formulation contains as particular cases the ones proposed by Fortemps and Roubens [7], Yager and Filev [12, 13] and follows a completely different approach. It starts with idea of "interval approximation of a fuzzy number" proposed, e.g., in [4, 8, 9]

Dualit\ue0 e convergenza stocastica dei minimi

si affronta il problema della dualit\ue0 di funzionali coercivi in spazi di Sobolev per valutarne i minimi in Gamma convergenz

Il problema della misurazione del rischio di credito: una rassegna critica di metodologie

in questo lavoro si presenta una carrellata di metodologie classiche ed innovative per la determinazione del rischio di credito bancario. Una visione critic

Fuzzy Expert Systems: Economic and Financial Applications

In this paper I present a survey of econoic and financial applications of fuzzy expert systems. Industrial districts, bank creditworthiness, insurance fraud

Un caso unidimensionale di omogeneizzazione stocastica"

Si affronta un caso di omogeizzazione stocastica unidimensionale in caso di funzionali dell'energia coercivi. Nel caso non coercivo si giunge ad un collegamento con il punto di percolazion

Ranking functions induced by weighted average of fuzzy numbers

I present a new method for ranking fuzzy numbers based on a general measure induced by a function