one such source: https://www.britannica.com/story/why-is-a-bakers-dozen-13
Also doesn’t pass some cursory thinking. If the law is about loaves being too light or small, how does giving out an extra loaf to people who buy 12 help? Who is even buying 12 loaves of bread when restaurants are rare and refrigeration non-existent? Armies, but then they’re buying even way more.
I don’t know why this needs a backstory. A dozen is a common number for objects because it’s highly composite. Then buy X get 1 free promotions are one of the simplest ways to give discounts. No one has to be the first to do it. It could spread and people could come up with it on their own.
If the baker gives you 13 and calls it 12, that makes it harder for a greedy baker narrative to stick. It doesn't have to be logical, it's about managing impressions.
> Who is even buying 12 loaves of bread when restaurants are rare and refrigeration non-existent?
The average family used to be the size of a small army. 12 loafs of bread could be eaten in 1 or 2 days if you've got 12 hungry kids and bread is a major component of their diet.
I suspect part of it was make 13 so if one gets messed up you still have 12 - and usually you don’t lose one so an extra is available.
Kind of like how Denny’s started giving you the thing they mixed the milkshake in along with the shake.
But don’t forget, people used to eat _way_ more bread in earlier times …
