This is a preview. Log in through your library . Abstract Correlation matrices play a key role in many multivariate methods (e.g., graphical model estimation and factor analysis). The current state-of ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

Troy Segal is an editor and writer. She has 20+ years of experience covering personal finance, wealth management, and business news. Samantha (Sam) Silberstein, CFP®, CSLP®, EA, is an experienced ...

I loved the "Oh, littler town ..." editorial on April 24. My early years were spent in the very small hamlet of Harris in Sullivan County. In those Great Depression days, we of course didn't have much ...

This is a preview. Log in through your library . Abstract The minimum chi-squared test is obtained for testing the hypothesis that the smallest r eigenvalues of an m × m correlation matrix are equal, ...

We all know the truism “Correlation doesn’t imply causation,” but when we see lines sloping together, bars rising together, or points on a scatterplot clustering, the data practically begs us to ...

When Tyler Vigen was finishing law school a few years ago, he went on a search for identical twins—not in the real world but in data sets. So he would find a study like this: And then keep searching ...