Mutiple Hand question

I was wondering how the affect of playing multiple hands has on the house advantage. (Assuming BS and flat betting). For example, at an empty table if one was to play all seven hands, (and still double/split accordingly), would this reduce/increase/unchange the edge that the casino has. Additionally, it would be interesting to know how that edged is affected if you always play 2hands, 3hands...etc.

The rules that we most commonly see here in the Pacific Northwest are: 6 deck, Doubling on any 2, Double after Split, Resplitting of Aces(x3)(one card received), no surrender, Dealer hits on Soft 17. I believe that this gives the house a .64-.66% advantage when I play one hand against him. It would seem that if I were to play 7(or 2 or 3...etc) hands for each one that he played it would affect this number. Or does it wash out in the end, expecially when you consider the dramitic swings in the bankroll?

This simulation could be then be taken a step further and apply this while using the count of your choice (I currently use HI-LO).

If possible, knowing how you approached the answer (mathematically speaking) would be wonderful. I unfortunately do not know how to approach this problem.

I have not seen this question asked here or answered in any of the material that I have read to date. If it has, I apologize and would appreciate a reference as to where to find the information.

Thank you,
Jaber

Playing multiple hands while using only basic strategy will not change the house advantage. Playing multiple hands while counting doesn't really change your advantage either, but it does allow you to put more money on the table with less variance, if done correctly and at optimum times. Blackjack Attack, by Don Schlesinger, provides a good treatment of this tactic and can probably answer the questions you have on this subject.

...I have just started BJA (2nd ed).

Thank you for the reference.
jaber