The New York Times has an article
about the cost investors pay to pursue active investing. This is a good read if you are trying to figure out your retirement strategy.
The author of the paper, Kenneth French, co-developed one of the most highly regarded valuation models. It's still in use today and is taught to every finance student. He also publishes
the spreads between the risk free rate and market rate of return, which are the cornerstone variables of almost *all* capital asset pricing model financial analyses. In other words, this guy knows his stuff.