Why not both? But seriously, mostly about the way to determine the "average" price. What beers are included? If one country has lots of beer drinkers, they're m

Why not both? But seriously, mostly about the way to determine the "average" price. What beers are included? If one country has lots of beer drinkers, they're most likely to have some pretty cheap beer, but also offer more expensive brands. Do they go into a liquor store in the US and determine the median price of all bottles there? Or just the top 5 beer brands (if so, top 5 local, top 5 world-wide etc.)? Makes this much harder to do than e.g. the famous "Big Mac Index".