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. 2014 Jan 21;111(5):1760–1765. doi: 10.1073/pnas.1307204111

Table 1.

Characteristics of American billionaire entrepreneurs: Educational attainment

Educational attainment (%) Billionaire entrepreneurs Self-employed Salaried workers
High school or less 6.1 31.6 36.8
Some college 10.4 17.6 17.1
College degree 38.5 34.3 33.6
Advanced degree 45.0 16.5 12.5

Educational attainment refers to population aged 25+.