In this paper I will try to apply an algorithm of hierarchic classification of the economic and financial performance for a group of companies in the chemical field, listed with the New York Stock Exchange (NYSE), a classification which will be performed taking into consideration the Return on...

Current estimators of variance for the k nearest neighbours (kNN) technique are designed for estimates of population totals. Their efficiency in small-area estimation problems can be poor. In this study, we propose a modified balanced repeated replication estimator of variance (BRR) of a kNN...

Multivariate mode hunting is of increasing practical importance. Only a few such methods exist, however, and there usually is a trade-off between practical feasibility and theoretical justification. In this paper we attempt to do both. We propose a method for locating isolated modes (or better,...