A positive correlation occurs as two variables move in the same direction. In economics, examples of variables with a positive correlation include the relationship between demand and price and GDP ...

A correlation matrix between three variables has to satisfy certain conditions. Such a matrix essentially contains three numbers and thus can be represented by a point in three dimensions. The set of ...

We introduce the matrix multivariate auto-distance covariance and correlation functions for time series, discuss their interpretation and develop consistent estimators for practical implementation. We ...