Except income is no longer bimodal. It was back in the 70s, but now there's just a single peak. See: https://ourworldindata.org/uploads/2013/12/Global-inequali

Except income is no longer bimodal. It was back in the 70s, but now there's just a single peak. See: https://ourworldindata.org/uploads/2013/12/Global-inequality-in-1800-1975-and-2015.png https://ourworldindata.org/uploads/2013/12/Global-inequality... However, growth in income is bimodal: https://commons.wikimedia.org/wiki/File:Global_changes_in_real_income_by_income_percentile_-_v1.png https://commons.wikimedia.org/wiki/File:Global_changes_in_re... Could that affect the phone market indirectly, by consumer confidence? It's possible, but it's not nearly as clear-cut as human height.