Originally posted by Naos
No they do not....you can do the same thing with degenerator's...and it is a bit easier...Step on it, then off, and repeat, you loose 1 level each time. For Fighter classes, leveling with monks is best and i am pretty sure forCaster classes the best is either BM or summoner, not sure though.

Yes, they do. If you refuse to believe me, take whatever unit you want, level him/her down, then up a few times, without switching Jobs. You'll eventually notice your stats dropping. You lose more through levelling down than you gain from levelling up.

What makes the trick work is changing Jobs. You level down as a Job that loses a small amount stats, then you level up as a Job that gains a lot of stats.