Spurious correlation between ratios with a common divisor

Ji-Hyun Kim

Statistics & Probability Letters, 1999, vol. 44, issue 4, 383-386

Abstract: One hundred years ago Karl Pearson derived an approximate formula for the correlation between ratios with a common divisor and cautioned to be wary of correlating ratios. The exact formula for the correlation between ratios is derived. It can provide a better reference point of no connection when correlating ratios with a common divisor.

Keywords: Coefficient; of; variation; Spurious; correlation (search for similar items in EconPapers)
Date: 1999
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Citations: View citations in EconPapers (9)

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