Rank association is a fundamental tool for expressing dependence in cases in which data are arranged in order. Measures of rank correlation have been accumulated in several contexts for more than a century and we were able to cite more than thirty of these coefficients, from simple ones to...

Rank correlation is a fundamental tool to express dependence in cases in which the data are arranged in order. There are, by contrast, circumstances where the ordinal association is of a nonlinear type. In this paper we investigate the effectiveness of several measures of rank correlation. These...

Many time series are of short duration because data acquisition has, of necessity, proceeded for but a brief term. Such data have previously often been analyzed by methods that either do not explicitly take into account time related changes or that are designed for long time series. In this...

In this paper we propose a new method of single imputation, reconstruction, and estimation of non-reported, incorrect or excluded values both in the target and in the auxiliary variables where the first is on ratio or interval scale and the last are heterogeneous in measurement scale. Our...

In a number of applications of multivariate analysis, the data matrix is not fully observed. Instead a set of distance matrices on the same entities is available. A reasonable strategy to construct a global distance matrix is to compute a weighted average of the partial distance matrices,...

In this paper we analyse the effect of gender quotas on women involvement in political activity using a rich data set providing information on all Italian local administrators elected from 1985 to 2007. Gender quotas were introduced in Italy by law in 1993 and were in force until 1995. Because...

The relationship between firms and environment is complex. The impact that firms have on the environment include the use of primary resources to make products and the production of wastes and emissions. The impact of firms’ products on the environment, moreover, is not negligible....

In this paper, we analyze the effect of gender quotas on women's involvement in political activity by using a rich data set providing information on all Italian local administrators who were elected from 1985 to 2007. Gender quotas were introduced by law in Italy in 1993 and were in force until...

Crime is a complex phenomenon which needs to be investigated at appropriate disaggregate temporal and territorial levels of analysis. The specic issue addressed in this paper concerns the possibility of classifying Italian provinces in groups by using a new methodology that combines cluster...