Paper showing that "Fair Coins Tend to Land on the Same Side They Started: Evidence from 350,757 Flips" circulating here a couple of years back (https://news.ycombinator.com/item?id=42181345) is now published in the Journal of the American Statistical Association.
The main difference from the original version is that we now document a decrease in the same-side bias over time. Meaning the more people flip, the less biased they are. We guess that it's a practice effect -- they might be getting better at coin flipping over time.
The main difference from the original version is that we now document a decrease in the same-side bias over time. Meaning the more people flip, the less biased they are. We guess that it's a practice effect -- they might be getting better at coin flipping over time.
(I'm the main author of the paper)