Where do you think your marginal tax rate will be in 2011? How about in 2012? 2013? You don't know? You're not sure? If you're a high earner, let's say $500,000 or more, are you concerned? Of course you are.
Should rising tax rates changes your deferral behavior? To the extent that you will have less take-home pay, perhaps it should. To the extent that you have a fear of deferring at a lower marginal rate and later being taxed at a higher marginal rate, the answer may surprise you.
Here is an article written by a few former colleagues of mine that I reviewed :