Friday, July 23, 2010

Luchametric MLS Power Rankings Updated: Dallas you say?

Current Luchametric MLS Power Rankings
Dallas sits atop our Power Rankings.  We've spent the last hour or so trying to figure out if there is a mistake somewhere.  There isn't.  Before you blow a gasket in disbelief, note that the LM is based on production per gameAnd if you compare Dallas' PTS/GM to the Crew, RSL and LA, the four teams are much closer than might appear just from looking at the single table.  Plus you have to factor in that Dallas has the best recent form, which we're perhaps weighing too heavily.  We need more time to look at that possibility.

The R-Squared when we regress the LM to point production in the league currently stands at .76.  This means that our metric explains 76% of the differences among the teams in terms of point production.  That's pretty good, but not as good as the R-squared for 08 and 09 combined, which is .83.  And our R-squared for point production in the EPL is around .90.  So, we're still examining why the MLS metric is not as sharp as the one we developed for the EPL (both are virtually the same).

Further, we'd point out that Dallas has only lost 13% of its games this year.  This puts them second in the league behind LA at 11%, and makes them over twice as good as RSL (26%) and well below the league average of 38%.n  They currently lead the league in draws.  In short, they are very, very, very tough to beat. They have drawn or won 87% of the games they have played thus far.  Our metric treats draws and performance in draws as significant evidence of a team's power--what we call "production."  The American proclivity to ignore draws as nothing more than "kissing your sister," we think ignores what draws tell us about a team. As such, Dallas gets more credit for how well it plays in wins, losses AND draws, which probably accounts for their place in the standings.  If they can maintain their rate of production, they should start getting some clean wins.  But it could also be that they've peaked at mid-season, and by the end of the year will drop back down in our rankings.  We'll see.

1 comment:

Kerry Bouffioux said...

could the more relative parity in MLS v EPL result in the lower Rsquared value? what could you use to determine the parity of a league?