[The Bandit Fish]

Well I'm probably wrong, but it's probably something along the lines of: If your hand is good enough to cold call, it should be good enough to raise with.

Also a raise in early position generally shows strength, so unless you're very sure of your hand you probably don't want to be just calling behind them.

The being said people at lower levels (I only have experience up to 1/2 NL, so take this with a grain of salt) tend to play strangely. I wouldn't recommend cold calling unless you have a monster or know the villain likes to raise in EP with crap.

I'm sure someone with more experience can chime in with much better advice than I'm capable of giving.