Correlation coefficients are indicators of the strength of the linear relationship between two different variables, x and y. A linear correlation coefficient that is greater than zero indicates a ...

Correlation coefficients range from -1 to +1, indicating the strength of relationships between variables. Investors use correlation coefficients for portfolio diversification to reduce risk.

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Consider a Gaussian vector z = (x′, y′)′, consisting of two sub-vectors x and y with dimensions p and q, respectively. With n independent observations of z, we study the correlation between x and y, ...

https://doi.org/10.1086/426518 • https://www.jstor.org/stable/10.1086/426518 Copy URL In this appendix, we describe our test for a structural change in the ...