February 14, 2001 12:00 am
One of the principal tenets of performance analysis is the idea that a
player's statistics are affected by his home ballpark. That's why most
serious performance metrics account for the environment in which a player
plays using a park factor. This park factor is generally arrived at by
comparing the number of runs scored in all games in team's home park and
comparing that to the number of runs scored in that team's road games.
I have found that there is good reason to doubt the value of these park
factors in a single season. I believe the relative ease or difficulty in
hitting in a specific park has a large random aspect, and hence much less
weight should be put on park factor for any single season.
Read the full article...