Not by casino but payback %'s are reported by area. Casino slot.
This from the American Casino Guide:
Unlike New Jersey, the Nevada Gaming Control Board does not break down its slot statistics by individual properties. Rather, they are classified by area.
The annual gaming revenue report breaks the Las Vegas market down into two major tourist areas: the Strip and downtown. There is also a very large locals market in Las Vegas and those casinos are shown in the gaming revenue report as the Boulder Strip and North Las Vegas areas.
When choosing where to do your slot gambling, you may want to keep in mind the following slot payback percentages for Nevada's fiscal year beginning July 1, 2014 and ending June 30, 2015:
These numbers reflect the percentage of money returned to the players on each denomination of machine. All electronic machines including slots, video poker and video keno are included in these numbers and the highest-paying returns are shown in bold print. As you can see, the machines in downtown Las Vegas pay out slightly more than those located on the Las Vegas Strip.
Returns even better than the downtown casinos can be found at some of the other locals casinos along Boulder Highway such as Boulder Station and Sam's Town and also in the North Las Vegas area which would include the Fiesta, Santa Fe and Texas Station casinos. Not only are those numbers among the best returns in the Las Vegas area, they are among the best payback percentages for anywhere in the United States.
They only break payout down by Strip, Downtown and Off Strip.
Casino en ligne
The center for gaming research at UNLV has a lot of reports.
Edited: 11:10 am, January 29, 2016
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I was just about to add that ^^
Even the worst VP pay tables will return ~95% with optimal play. I am not what the ratio of slots vs. VP is in those calculations but you I would assume you could deduct a few more percentage points from the slot paybacks.
"Even the worst VP pay tables will return ~95% with optimal play." True, but why would you think that someone playing a terrible VP paytable would be playing with optimal strategy or even close to optimal? I would bet that the average return on a machine that bad is more like 90% when you factor in that a good chunk of the people playing those machines have no idea about strategy and some are playing less than max coin which makes it even worse.
I would think that the only VP machines that even come close to returning what their paytable says are the 99%+ ones at locals casinos, and even those probably get occasional play from people who don't know what they're doing.
The overall point that you're making is still true - that with VP, slots, and keno numbers all lumped in together it's impossible to really say what the slots pay back. I think all you can really do with the numbers is compare the different locations on relative terms. (But even still, if there are enough skilled VP players off the strip who play higher paying machines with better strategy, that might be skewing the numbers).
That said, I would think that the inclusion of video keno helps mitigate the VP numbers (isn't keno by far the worst, significantly worse than slots even?) and I think it also matters by denomination. 1c probably includes less VP since there are fewer 1c VP machines than 25c/$1.
"That said, I would think that the inclusion of video keno helps mitigate the VP numbers (isn't keno by far the worst, significantly worse than slots even?) and I think it also matters by denomination. 1c probably includes less VP since there are fewer 1c VP machines than 25c/$1."
I was thinking the same thing about the keno, except if they weight the paybacks by number of machines then I don't think there would be that much of an effect from the Keno machines.
I'll distinguish 3 different games as reel slots, video poker, and keno.
Locals casino's ratio of vp/keno to slots is higher. So you have high-paytable vp on the same machine as relatively low-payout keno? I don't play keno, live or machine. I do know that machine keno has better returns than live. But you'll still lose more per hour on the machine keno, because the play is faster. Are the keno paytables better off Strip? Probably.
Slots is a general term, as far as reported data. So I'm not even sure it can be said the reel slots pay better off the Strip, though I suspect it is true, because I have always believed the places with good vp will also have decent slot(and keno?) returns. After all, locals casinos have far fewer ways to attract players than the Strip hotels, with their shows, themes, restaurants, etc.
I'm not sure any definitive conclusions can be drawn, except that vp is better downtown, and better still in the locals casinos. Does that also mean the reel slots are better? Too little data to know for sure.
Edited: 1:40 pm, January 29, 2016