Yule's "nonsense correlation" solved: Part II

Philip A. Ernst, L. C. G. Rogers, Quan Zhou

In 1926, G. Udny Yule considered the following: given a sequence of pairs of random variables $\{X_k,Y_k\}$ ($k=1,2,\dots ,n$), and letting $X_i=S_i$ and $Y_i=S_i^{\prime }$ where $S…