Rocío De Andrés

Universidad de Salamanca · Department of Economics and Economic History

Preferences and their classification are essential in many decision making processes. However, grouping preferences is not an easy matter because their very nature. In this paper a new preference clustering algorithm is proposed that incorporates the key features of preferences, usually represented by order vectors, and it takes ideas from Social C...

Nowadays, there is not an effective COVID-19 disease treatment, then vaccination provides the best hope to restrain the dissemination of the disease. However, a portion of the population doubts the safety of vaccination and many people are unwilling to get vaccinated because of their risk perception. The aim of this study is to understand people’s...

This paper analyzes the stability of citizens’ preferences on public healthcare services in Spain. Nowadays, the increasing privatization of some healthcare services and the rapid emergence of private hospitals have caused changes in people’s preferences on public healthcare systems. This paper focuses on analyzing the preferences of Spaniards on t...

Traditionally, preferences have been considered stable although there are growing evidences that such stability is a mere theoretical assumption. Attending to this fact, it should be interesting to measure how much stability preferences provide in order to improve decision making processes. Surprisingly, no research has been found on measuring pref...

The need for organizations to evaluate their environmental practices has been recently increasing. This fact has led to the development of many approaches to appraise such practices. In this paper, a novel decision model to evaluate company's environmental practices is proposed to improve traditional evaluation process in different facets. Firstly,...

This work introduces a non-traditional perspective about the problem of measuring the stability of agents’ preferences. Specifically, the cohesiveness of preferences at different moments of time is explored under the assumption of considering dichotomous evaluations. The general concept of time cohesiveness measure is introduced as well as a partic...

We provide a methodology to perform an extensive and systematized analysis of problems where experts voice their opinions on the attributes of projects through a hesitant fuzzy decision matrix. This provides the decision-maker with ample information on which he or she can rely in order to make the final decision, in the form of segments instead of...

In this paper we address the problem of measuring the degree of consensus/dissensus in a context where experts or agents express their opinions on alternatives or issues by means of cardinal evaluations. To this end we propose a new class of distance-based consensus model, the family of the Mahalanobis dissensus measures for profiles of cardinal va...

The concept of life quality is a subjective feeling that only patient is able to define. The absence of disease is one of the determinants of well-being and life quality. Generally, self-perceived health status is measured by specific or generic questionnaires. The health information collected in the questionnaires is usually expressed by numerical...

In a framework where experts or agents express their opinions in a dichotomous way, we analyze the cohesiveness of their opinions on a fixed set of issues in a population. A parametric family of related measures are introduced and axiomatically characterized. They are ordinally equivalent when the population is fixed, and some further properties ar...

The previous correlation measures for hesitant fuzzy sets proposed in the literature only capture the strength of the correlations. We present a new approach based on the classical Pearson correlation coefficient for crisp values. In this way we can express not only the strength of the relationship between two hesitant fuzzy sets, but also whether...

The evaluation of the health status of a population is a key question in Health Policy. The measurement of the health status is a relevant process to keep and improve the countries' level of economic development. In spite of this relevance, the current evaluation methodologies are not sufficiently well-defined either designed due to the fact that h...

The evaluation of the health status of a population is a key question in Health Policy. The measurement of the health status is a relevant process to keep and improve the countries' level of economic development. In spite of this relevance, the current evaluation methodologies are not sufficiently well-defined either designed due to the fact that h...

The concept of life quality is a subjective feeling that only patient is able to define. The absence of disease is one of the determinants of well-being and life quality. Generally, self-perceived health status is measured by specific or generic questionnaires. The health information collected in the questionnaires is usually expressed by numerical...

We provide a methodology to perfom an extensive and systematized analysis of problems where experts voice their opinions on the attributes of projects through a hesitant fuzzy decision matrix. A weighted average of specific parametric expressions for two tenable indices of satisfaction permits to give a profuse picture of the relative performance o...

A classical group decision making problem arises when a group of voters, experts, ... have to make a decision on a set of alternatives, candi-dates, .... The experts' opinions about the alter-natives are usually characterized by their ideas, principles, knowledge, etc. which is a source for conflict when it comes to making a collective de-cision. D...

We introduce the use of the Mahalanobis distance for the analysis of the cohesiveness of a group of linear orders or complete preorders. We prove that arbitrary codifications of the preferences are incompatible with this formulation, while affine transformations permit to compare profiles on the basis of such a proposal. This measure seems especial...

In this article we are concerned with assessing the cohesiveness of a society whose individual preferences are known. We analyse the axiomatic properties of a general proposal to measure aggregate satisfaction in terms of coherence of the expressed opinions, that relies on the consensus with reference to a select social preference. The formal conce...

In this work, we contribute to the formal and computational analysis of the measurement of consensus in a society. We propose a unifying model that generates a consistent decision in terms of the individual preferences and then measures the consensus that arises from it. We focus our inspection on two relevant and specific cases: the Borda and the...

Recently, it has been presented the concept of Hesitant Fuzzy Linguistic Term Sets (HFLTS) to manage hesitant situations under qualitative settings in which experts hesitate among different linguistic terms to express their preferences or assessments. It was also defined the concept of envelope for an HFLTS to carry out the computational processes...

The need of organizations to evaluate their environmental practices is increasing, but there are many possibilities to do it. In this contribution an aggregation procedure is proposed to evaluate company's environmental practices. This proposal integrates quantitative and qualitative information. Since the assumption of independence among criteria...

In many realistic group decision making problems where a “representative” collective output must be produced, it is relevant to measure how much consensus this solution conveys to the group. Many aspects influence the final decision in group decision making problems. Two key issues are the experts’ individual opinions and the methodology followed t...

Decision makers are increasingly involved in complex real decisions that require multiple viewpoints. A specific case of this fact is the evaluation of sustainable policies related to environment and energy sectors. In this evaluation process, multiple experts are involved to assess a set of scenarios, according to multiple criteria that might have...

The need of organizations to evaluate their environmental practices is increasing, but there are many possibilities to do it. In this paper a decision model is proposed to evaluate company's environmental practice taking into account different collectives of reviewers related to the company's activity. Moreover, this model integrates quantitative a...

Performance appraisal is a process used by some firms to evaluate their employees’ efficiency and productivity in order to plan their promotion policy, salary policy, layoffs policy, etc. Initially this process was just carried out by the executive staff, but recently it has evolved into an evaluation process based on the opinion of different revie...

In some group decision making problems of real life not only is significant to rank the alternatives but it also is important to measure how much consensus this solution conveys to the group. Due to this fact, in this work we propose a new methodology to measure the degree of consensus obtained by a group decision making process. To develop that ap...

Performance appraisal is a process used by companies in order to evaluate their employees' efficiency and productivity for planning their Human Resource policies. Traditionally this process has just been carried out by the executive staff but recently it has started to be based on opinions of different appraisers, being called integral evaluation....

Generally, the health status can be measured by means of specific or generic questionnaires that let identify if an illness, a complication or a treatment affect the quality of life. In the existing literature the health status concept is a subjective impression, and patient is only person capable to define it. There are a lot of indexes to measure...

This paper proposes an endogenous human resources selection process by using linguistic information from a competency management perspective. We consider different sets of appraisers taking part in the evaluation process, having a different knowledge about the candidates that are being evaluated. Then, appraisers can express their assessments in di...

The performance appraisal is a relevant process to keep and improve the competitiveness of companies in nowadays. In spite of this relevance, the current perfor- mance appraisal models are not sufficiently well-defined either designed for the evaluation framework in which they are defined. This paper proposes a performance appraisal model where the...

Performance appraisal is a process used by companies, in order to evaluate the employees' efficiency and productivity, for planning their Human Resource policies Traditionally, this process has just been carried out by the executive staff, although recently it has been developed evaluation processes based on the opinion of different types of apprai...

Performance appraisal is a process used for some firms in order to evaluate the employees¿ efficiency and productivity for planning their promotion policy. Initially this process was carried out just by the executive staff, but recently it has evolved to an evaluation process based on the opinion of different reviewers, supervisors, collaborators,...

This paper proposes a linguistic performance appraisal from a competency management perspective, where there are different sets of reviewers taking part in the evaluation process that have a different knowledge about the evaluated employees. The reviewers can express their assessments in different linguistic domains according to their knowledge. Th...

Performance appraisal is a process used for some firms in order to evaluate the efficiency and productivity of their employees for planning their promotion policy. Initially this process was carried out just by the executive staff, but recently it has evolved to an evaluation process based on the opinion of different reviewers, supervisors, collabo...

Uno de los métodos de evaluación del desempeño que algunas empresas y organizaciones utilizan para mejorar su productividad y competitividad es el de evaluación de 360º. Este método incluye en el proceso de evaluación las opiniones emitidas por personas que interactúan con el trabajador: directivos, compañeros, subordinados, clientes, incluso la qu...

Resumen La evaluación del desempeño es un proceso utilizado por algunas grandes empresas para evaluar la eficiencia y rendimiento individual de sus empleados con el objetivo de establecer planes de remuneraciones variables o de promoción del personal. Esta evaluación se basa en la opinión de distintos evaluadores sobre indicadores que pueden ser ob...

El problema de la cualificación e identificación de los individuos pertenecientes a un grupo es uno de los más recientes problemas abordados desde la Teoría de la Elección Social. En este trabajo hemos tratado un problema similar: el de la selección endógena de un grupo de expertos dentro de un colectivo a partir de las opiniones de cada individuo...

Performance appraisal is a process used for some companies in order to evaluate the efficiency and productivity of their employees. Initially this process was carried out just by the executive staff, but recently it has evolved to an evaluation process based on the opinion of different reviewers, including supervisors, collaborators, customers and...

The problem of qualification and identification of individuals belonging to a group is one of the most recent problems analyzed in the Social Choice Theory. In this paper we deal with a similar problem: the endogenous selection of experts in a group taking into account the opinions of each individual over every member of the group, including himsel...

Abstract Performance,appraisal,is a process,used,for some,firms in order to evaluate,the efficiency and,productivity,of their employees,for plan- ning their promotion,policy. Initially this pro- cess was carried out just by the executive staff, but,recently,it has evolved,to an evaluation process,based,on the opinion,of different ap- praisers, supe...

In this work we contribute to the formal analysis of the measurement of consensus in a society. Instead of approaching the topic from an absolute perspective we are concerned with a practical application: the proposal of a decision mechanism with respect to which consensus is measured. Surprisingly this produces a powerful unifying model, a restric...

This paper proposes a linguistic performance appraisal from a competency management perspective, where there are different sets of reviewers taking part in the evaluation process that have a different knowledge about the evaluated employees. Reviewers can express their assessments in different linguistic domains according to their knowledge. The pr...