1. Audretsch, D. (2007). Entrepreneurship and economic growth. Oxford Review of Economic Policy, 23(1), 63–78. doi: 10.1093/oxrep/grm001 .
2. Baum, S., Ma, J., & Payea, K. (2013). Education pays 2013: The benefits of higher education for individuals and society. New York, NY: The College Board, Trends in Higher Education. Retrieved from https://trends.collegeboard.org/sites/default/files/education-pays-2013-full-report.pdf .
3. Bell, D. (2004). Silent covenants: Brown v. Board of Education and the unfulfilled hopes for racial reform. New York, NY: Oxford University Press.
4. Belman, D., & Heywood, J. (1990). Union membership, union organization and the dispersion of wages. Review of Economics and Statistics, 72, 148–153.
5. Blanchflower, D., Levine, P., & Zimmerman, D. (2003). Discrimination in the small-business credit market. The Review of Economics and Statistics, 85(4), 930–943. doi: 10.1162/003465303772815835 .