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And foud that WPA cross-correlated with itself (from one year to the next) with an R value of about 0.48 I believe. Pearson correlations use the rank (best, worst, or some discrete rank in between) for each pool being correlated together rather than the actual magnitude data.
A cross-correlation of 0.48 is significant statistically for sure - comparable to OPS...but pretty weak compared to some of the component statistics we use for making real projections.