A quantile correlation coefficient is newly defined as the geometric mean of two regression slopes—that X on Y and that X—in same way Pearson related to coefficients. The a measure overall sensitivity conditional random variable changes in other variable. proposed can be compared across different tails within given distribution provide meaningful interpretations, for example, there stronger dep...

Abstract Risk management is an important aspect of financial research because correlations among data are essential in evaluating portfolio risk. Among various correlations, spatiotemporal involve economic entity attributes and interrelated space time. Such have therefore drawn increasing attention risk management. However, classical correlation measurements typically based on either time serie...

A formula for determining the correlation coefficients is proposed, according to which with a small number of measurements values will be larger compared calculated by known formulas, i.e., these less offset relative true coefficients.
 In geodesy in general are limited measurements, photogrammetry at mutual orientation pictures stereo pair an automatic mode identification points on left a...