Lee Jones' book

But proper strategy is to play a lot tighter when you are in loose games. You do this not to reduce variance but to maximaize expectation. That's because there is something known as the "Horse Race Concept" where you will discover that by playing a little tighter you will be making too many second best hands. (See Getting the Best of It by David Sklansky for more information.) Alos, in HPFAP-21 we explain how aggressive/passive impacts the number of hands that you should play, while loose/tight should impact the mix of hands that you play.

<blockquote>Also, Jones points out that if you play a LITTLE tighter than the overall (loose) table, you can expect to win</blockquote> Actually, Mason, Jones has removed this advice in the second edition of his book because he hasn't "seen any evidence of it" and now suggest only "when the table get crazy, play only your best cards".