So yeah, this is just going to be a quick post to deal with some house-keeping. I’ve run a series of tests to check the repeatability of the various metrics I use. These are all done at player level, I plan on doing the same at team level at some stage. There will be no fancy Tableau graphics here! Just plain old Excel scatter plots. So here is a rundown of what I found. These may, or may not be useful for somebody.
GPS – Goal Probability Per Shot per 90
Expected Goals per 90
Expected Goal Difference Per 90
Expected Goals From Shot Placement per 90
Expected Goals Shot Placement Difference Per 90
Expected Goals Shot Placement per Shot per 90
Shot Placement Extra Goals per 90 (SPEG)