The more I look around at the rankings, the more I like them. I like that the launching system is gone, but we also don't have the problem that used to be in place where fighters started with a certain number of points. In that old ranking system, you'd have a guy with a 0-1 record ahead of a guy with a 1-5 record only because he hadn't yet had enough time to lose his points. Having all fighters who haven't proven anything at zero points is better (although, even if they are considered to be not ranked amongst themselves they should be considered within the total ranking - heavyweight rankings show 'rank/876' when there are 1098 heavyweights in the database).
The launching system seemed designed to hold back David Rodriguez, who is apparently using his career to create a statistical outlier. I think under the predictive system, he would have jumped very, very high as soon as he beat a launched fighter (like Wallace McDaniel

). Now, he is ranked appropriately at 139, well below his IBO ranking of 82 (which does not even include his last win). Brian Minto is 61 on IBO, but 26 on Boxrec, so there are definitely some big differences. David Diaz is 10, Palyani is 28. Thank goodness - that is much, much better. Palyani is still a lot higher than on the IBO rating (57), which I think is appropriate.
On the issues which are being brought up:
1) Should fighter A always be ahead of fighter B if he beats him? After a lot of thought, I think the answer is yes. The problem arises in the next iteration - when fighter A loses to fighter C, C takes all of those points A won against B. Most of the time this is okay, but when a 3-63 Euro opponent upsets some protected prospect, then the fighter who gets the first chance at him will be a major beneficiary. It would be nice if there was a way to adjust points based on the following results. If the 3-63 fighter goes out and loses his next 6 fights, then the points earned against him in those fights would be diminished in some way. Alternatively, you could perhaps create an adjustment for a result against a fighter who then goes on to win several fights in a row. Perhaps Omar Nino Romero would have been more highly ranked if his early career win over Jorge Arce had been slightly, continuously bumped up in value as Arce began moving up the rankings. Same, say, with Rodney Jones and his early career win over Antonio Margarito.
2) The biggest perceived problem with these rankings is the grip on the top of fighters like Ruiz and Jones. The old system's big benefits to young, active prospects did correctly forecast rising youth in some cases. For instance, Sharmba Mitchell was ahead of Paul Williams in every ranking set-up, except the old predictive method, even though Williams was the favorite in the fight. I don't think that means that the predictive ranking was good, but it does perhaps show a missing element in the new rankings.
It would be very interesting to see a regression analysis done to determine the peak age of boxers. This was successfully done with baseball (peak age was found to be about 27) and I think with so many boxing records in the database you could probably find a significant statistic of when fighters start to decline. Of course, it depends on weight class and the number of rounds fought as well - but I would love to see a way to measure 'decay'. This might be a downward adjustment for a loss by a veteran figher, since losses past a certain age or experience level are usually the signifier that the fighter is on a downward trend. If a significant statistic could be gleaned, it might help to correctly downgrade fighters who are shot or approaching the end of their careers, and fix perceived problems like Sharmba Mitchell.
Anyway, great rankings Martin. I am glad we have just one set, and it is this one.