Peter Zhang has completed a significant empirical project on disclosure norms:
I scraped the wikis (during off-hours) of every season starting 2014. … I collected the round info, cite names, and round reports of each team’s page.
I also collected Tabroom data on every LD bid tournament, with historical records reaching back as far as available. … For the 295 remaining tournaments, I scraped the Novice, JV, and Varsity entries of LD, PF, and Policy.
Among his findings:
All of this is a far cry from what we used to see on the circuit and what led us to publish probably a dozen times on disclosure over the years.
Read the whole thing here.