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Tuesday, July 10, 2012

2012 Age Impact: What Difference Does a Year Make?

The Age Impact (AI) is my attempt to improve on the returning starters concept. Using total yards by class from 2011 (see bar charts on the right), we can explain about 10% of the change in total yards from year to year - teams that got more production from freshman and sophomores the year before tend to see an increase in total yards, and vice versa. The Age Impact is (roughly) the estimated change in total yards from the year before.

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