https://www.nickkolenda.com/psychological-pricing-strategies/
First off, thank you. Lots of interesting food for thought. I've debated the 299 vs 300 question a lot, but it's hard for me to get enough data to test effectively.
Second...
https://www.nature.com/news/over-half-of-psychology-studies-fail-reproducibility-test-1.18248
At least it doesn't have the long debunked "rule" of ending prices in "7" that seems to be gospel in some circles