This was a really interesting read! I find it so tiresome trying to evaluate food prices and optimize grocery shopping to optimize [time and money spent], and a large data set like this could make it much easier. Is anyone aware of a similar price analysis for the United States?
Another way to go about it is to check the profit margins of your sellers. In the US, all the big companies are publicly listed, so as long as you shop at Costco/Walmart/Target/Kroger/Albertsons/etc, you know you will not be paying more than a couple percent above what it costs the retailer to sell to you.
Obviously, individual items within the store have different margins, but almost all unprepared / expiring foods will be at the lowest margins.
Winco/Aldi/Lidl are other grocery businesses where it is known the markup is extremely minimal.
