4th down attempts in American football come to mind. Twenty years ago they were rare; mathematically they should be common.[1] Coaches have shifted with the mat

4th down attempts in American football come to mind. Twenty years ago they were rare; mathematically they should be common.[1] Coaches have shifted with the math but not quite as dramatically as it suggests. [1] https://malteranalytics.github.io/nfl-4th-down/ https://malteranalytics.github.io/nfl-4th-down/