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Showing 1 to 1 of 1 for “"PITCHf/x"”.
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An investigaton of umpire performance using PITCHf/x data via longitudinal analysis
… use of technology in sports officiating. We use PITCHf/x data to answer 3 questions. 1) Has the proportion of incorrect calls made by a major league umpire decreased over time? 2) Does the proportion of incorrect calls differ for umpires hired prior to the implementation of technology in …