55 rows  Mar 08, 2019  There is a lot of confusion between the house edge and hold, especially.

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You forgot to include the idiots that play BJ for 6:5 when a 3:2 is on the next table, etc.[edit] -- deleted, did not understand OP's question.
--DorothyHmmm... it depends on the distribution of the players. Out of a group of 100 players, I would say only 5% know perfect basic strategy. They get the .26% HA.
Another 20% are good strategists. They make a few errors, like standing a soft 18 on a 10, standing on a 12 vs a 3, and make a few iffy doubling and splitting decisions (Splitting 4 on 4, not splitting 9s on a 9, not doubling a soft 15 on a 6, etc). Let's say they make 10 errant basic strategy decisions consistently that costs them 10% of the EV vs the correct decision. Multiply this by the % of hands that this occurs (there are 26 different decisions and 10 dealer positions, so getting six wrong probably means the combination where the wrong decision is made on 4% of hands. So, .10 x .04 = .004. They get the .66% HA.
Another 50% make alot of mistakes but know some strategy, like to make a decision based on the dealer's up card. But they will always stay on 12 on a dealer 2 and 3, they will make bad splitting a doubling decisions. Say, out of the 260 combinations, they make bad decisions on 10% of hands which costs them, say 20% of EV (.10 x .20 = .02). They get assigned a 2.26% HA.
The other 25% are out to lunch and have no idea what they are doing. According to the Wizard, they follow a strategy like 'Mimic the Dealer' or 'Never Bust'. They get assigned a HA of 5%.
So, when you put it all together .26% x 5% + .66% x 20% + 2.26% x 50% + 5% x 25% = 2.525%.
That's my guess anyway, about 2.5%. The thing is that a drunkie is far more likely to sit at a 6/5 table than stumble into a game with a .26% HA.Peter Griffin devoted a whole chapter to the question of the cost of playing errors in his book 'Extra Stuff -- Gambling Ramblings.' His study was based on observing 11,000 actual hands of play in 1987. The following table summarizes his results of the cost of errors made.

City	Cost of Errors	Margin of Error
Atlantic City	1.13%	0.12%
Las Vegas	1.67%	0.17%
Reno	1.48%	0.19%
Lake Tahoe	1.39%	0.54%
Total	1.41%	0.10%

In my opinion, play has improved a lot in the 23 years since the study. If forced to guess, I think the cost due to errors is only about 0.5% now, based on total amount bet. The smaller the bet, the higher it tends to be. Griffin standardized the bet size in his study. I would agree with Griffin that Atlantic City players are more skilled than Vegas players.

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If forced to guess, I think the cost due to errors is only about 0.5% now, based on total amount bet. The smaller the bet, the higher it tends to be. Griffin standardized the bet size in his study.

I don't know Wizard. If what you say is true, then a good blackjack table (0.26% house edge) only has a 0.76% house advantage when you factor in errors. While I agree with you that a $5 per hand player is likely to be less skilled then a $100 per hand player, I have seen more then my share of bad 'high rollers' out there.
On a side note, let's say you were a god awful blackjack player. Would you get more comps then a good basic strategy player with the same per hand play? Or would they just rate you as the same $100 a hand (for example) player.

I don't know Wizard. If what you say is true, then a good blackjack table (0.26% house edge) only has a 0.76% house advantage when you factor in errors. While I agree with you that a $5 per hand player is likely to be less skilled then a $100 per hand player, I have seen more then my share of bad 'high rollers' out there.
On a side note, let's say you were a god awful blackjack player. Would you get more comps then a good basic strategy player with the same per hand play? Or would they just rate you as the same $100 a hand (for example) player.

I know of one major casino in Vegas that assumes a 0.75% house edge in blackjack (source). Griffin also said about 5% of hands were not played correctly. It seems to me that most errors are relatively minor ones, like standing on 12 against a 2, and/or don't happen often, like not soft doubling when you're supposed to. It isn't just blackjack, players are more skilled across the board than they used to be. It is much easier to get good information about gambling. Hopefully I've played a part in that.
To answer your question, most casinos generally don't take skill into consideration. Jim Kilby's 'Casino Operations Management' shows a rating slip with three levels of skill, but everyone I speak with says they just go by average bet and hours played. There would be exceptions for whales, where play gets watched more carefully. Indeed, they could expect to be treated better if they played badly, but it would likely be an informal adjustment.
However, mark my words, the day will come where every bet and every mistake will be recorded, and your exact skill level will be known. This will be done by sensors for the bets, and either card readers or cameras for the cards. This will be true for all games of skill. Milk the comps now, while you still can.

I know of one major casino in Vegas that assumes a 0.75% house edge in blackjack (source). Griffin also said about 5% of hands were not played correctly. It seems to me that most errors are relatively minor ones, like standing on 12 against a 2, and/or don't happen often, like not soft doubling when you're supposed to.

That's an interesting statistic. Even allowing that 0.75% is for traditional blackjack, and must be increased to cover 6:5, superfun, and other variations, that means that each chip is played on the order of ten times to get the win percent reported in the NGCB publications which is currently 11.38% statewide.
I wouldn't have though that people replay their chips that many times.

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Side Question Players must be passionately attached to chips. You would think that casinos could still play with dealers, cards, felt and dice, but replace chips with electronic devices that would allow them to easily collect data, distribute comps, look for cheating, and check disputes. I must assume that all experimental moves in this direction have met with dismal failure.They might have a higher theoretical for 6 to 5 blackjack, but I'm not sure. Perhaps croupier can tell us.
Player tracking will be able to be done with chips and live dealers. Sensers under the felt will be able to read bet amounts. Shufflers can read cards as the come out, but something else would have to indicate which player received it. Such technology was displayed at the Global Gaming Expo, but I heard it was still buggy. Just give it 5-10 more years.