How Big is Big Data?

‘Big’ Data Can Be 99.98% Smaller Than It Appears
https://www.bloomberg.com/news/articles/2021-03-08/-big-data-can-be-99-98-smaller-than-it-appears
 
STATISTICAL PARADISES AND PARADOXES IN BIG DATA (I): LAW OF LARGE POPULATIONS, BIG DATA PARADOX, AND THE 2016 US PRESIDENTIAL ELECTION
https://statistics.fas.harvard.edu/files/statistics-2/files/statistical_paradises_and_paradoxes.pdf