This paper introduces new similarity classifiers using the Heronian mean, and the generalized Heronian mean operators. We examine the use of these operators at the aggregation step within the similarity classifier. The similarity classifier was earlier studied with other operators, in particular with an arithmetic mean, generalized mean, OWA operators, and many more. The two classifiers here ar...

To what extent do politicians reward voters who are members of their own ethnic or racial group? Using data from large cities in the United States, we study how black employment outcomes are affected by changes in the race of the cities’ mayors between 1973 and 2004. We find that black employment and labor force participation rise, and the black unemployment rate falls, during the tenure of bla...

Local governments are particularly relevant to people’s daily lives as they manage infrastructure and services that directly influence quality of life. Elected mayors tend to be more responsive to the needs of the poor majority than centrally-appointed mayors or mayors elected by fellow councillors. Colombia’s municipal mayors have been elected since 1988, with local governments given increased...

This article discusses a range of regression techniques specifically tailored to building aggregation operators from empirical data. These techniques identify optimal parameters of aggregation operators from various classes (triangular norms, uninorms, copulas, ordered weighted aggregation (OWA), generalized means, and compensatory and general aggregation operators), while allowing one to prese...

This paper deals with aggregation operators. A new class of aggregation operators, called asymptotically idempotent, is introduced. A generalization of the basic notion of aggregation operator is provided, with an in-depth discussion of the notion of idempotency. Some general contruction methods of commutative, asymptotically idempotent aggregation operators admitting a neutral element are illu...