articles on covered call options

[skindog]

I've heard of a study saying that covered call writers perform better than ordinary stockholders over the long run. I've sorta seen this from my own experience with covered call writing - it's not rare that I get a >1% monthly return while only selling my upside above a 20 or 30% return on the stock. Think about that - writing seems pretty lucrative. If anyone knows of any such article/research, please throw it my way. I suck at searching and haven't been able to find anything.