RESEARCH: Indicators, starting points, and bi-linear correlations, part 2: Pitchers

Leading indicators are valuable for their relative stability in the face of luck and context-dependent variation in outcomes. Sustained changes in indictors suggest changes in performance will follow, because of the correlation between these indicators and performance. However, it stands to reason that the same relative change in performance could have a different effect on performance, depending on the starting performance level. 

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  For more information about the terms used in this article, see our Glossary Primer.