1. Appelbaum, L. D. (2010). Why a domestic workers bill of rights? UCLA IRLE Research & Policy Brief, No. 6. Retrieved from http://irle.ucla.edu/wp-content/uploads/2016/03/ResearchBrief6.pdf
2. Azar, J., Marinescu, I. & Steinbaum, M. I. (2017). Labor market concentration. NBER Working Paper Series: No. w24147.
3. Missing Links in Labour Geography
4. Bureau of Labor Statistics (BLS). (2017). Table 1.7 occupational projections, 2016–26, and worker characteristics, 2016. Retrieved from https://www.bls.gov/emp/ep_table_107.htm
5. Bureau of Labor Statistics (BLS). (2018). Labor force statistics from the current population survey. Retrieved from https://data.bls.gov/timeseries/LNS14000000