Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Robert Kelly is managing director of XTS ...

This article presents and compares two approaches of principal component (PC) analysis for two-dimensional functional data on a possibly irregular domain. The first approach applies the singular value ...

Forbes contributors publish independent expert analyses and insights. I am a Customer Experience Futurist, Author and Keynote Speaker. Understanding your customers when there’s only a handful isn’t ...

Conclusive research is a structured data collection technique that provides detailed, factual information that's useful in decision-making. Descriptive marketing research is a form of conclusive ...

The selection of copulas is an important aspect of dependence modeling. In many practical applications, only a limited number of copulas is tested, and the modeling applications usually are restricted ...

Let me be upfront: this post will contain statistics. Not the fun, pithy kind like “60 percent of statistics are made up on the spot,” but actual cold, hard statistical practices. Joking aside, I’m ...

Clay Halton was a Business Editor at Investopedia and has been working in the finance publishing field for more than five years. He also writes and edits personal finance content, with a focus on ...