Edward Timmons1, Conor Norris1, and Noah Trudeau1,2
1: Knee Center for the Study of Occupational Regulation, West Virginia University
2: Troy University, Alabama
Occupational licensing makes it illegal to work in an occupation before meeting state-mandated entry requirements that often include minimum levels of education and training, paying fees to the state, and passing exams. Nationally, 21% of workers are licensed.
Licensing requirements for the same profession vary significantly across states. The 2023 State Occupational Licensing Index (SOLI) ranks states by the number of occupations that are licensed. The SOLI database focuses on 331 occupations that are available in the Knee Center licensing database.
California’s SOLI ranking
In the 2023 SOLI, California ranks 11th nationally (with 1st being the most burdensome). California makes it illegal to work in 189 of the 331 occupations examined. This is 10 more occupations than the national average of 179 and more than 40 more than Kansas—the state with the fewest legal barriers (147) to working nationally.
Uniquely licensed occupations in California
Among the 189 occupations that California establishes minimum entry requirements to begin working, there are 26 occupations that are licensed in 20 states or fewer nationally. Table 1 provides a full list of these occupations and there is also a separate excel file with full details for interested readers.
California is the only state in the country to license two subfields of electricians: fire life safety and non-residential lighting techs. California is also the only state in the country to license professional geophysicists, and one of six states to license manicurist apprentices.
Table 1: Uniquely licensed occupations in California
|Fire Life Safety Tech Electrician||1|
|Non-residential Lighting Tech Electrician||1|
|Certified Engineering Geologist||2|
|Rental Listing Referral Agent||3|
|Advanced Police Officer||8|
|Animal Control Officer||11|
|License Piping Contractor||11|
|Vehicle Factory Representative||12|
|Nail Technician Apprentice||13|
|Certified Real Estate Evaluator||15|
|Geologist in Training||15|
|Medical Clinical Laboratory Technician||15|
|Professional Boxer/Wrestler/Fighter Trainer||15|
|Sanitarian Trainee /Aide||19|
Sources: State Occupational Licensing Index 2023 Master File and Knee Center Occupational Licensing Database.
Why Licensing Reform is Important
By making it illegal to work in 189 occupations, and uniquely licensing at least 26 occupations, California is imposing significant cost on its citizens.
Existing economic research suggests that occupational licensing raises prices by as much as 16%. Licensing also reduces employment by as much as 27% by making it more difficult to begin working in licensed professions. Nationally, it is estimated that occupational licensing results in 2 million fewer jobs being created each year.
Although licensing may have historically resulted in some benefits to consumers, there is little evidence that it is helping consumers in the present. Recent work finds little evidence that occupational licensing is improving the quality of services provided to consumers in the US and Europe.
In summary, California currently places unique restrictions on its citizens to begin working. These restrictions are very costly and generate little to no measurable benefits for consumers. Following the lead of the majority of other states and choosing less restrictive ways to regulate and protect consumers would be in the best interest of California citizens.
 Data on certifications and licenses (CPS), Bureau of Labor Statistics, https://www.bls.gov/cps/certifications-and-licenses.htm, January 25, 2023.
 Noah Trudeau and Edward Timmons. State Occupational Licensing Index 2023. Archbridge Institute, https://www.archbridgeinstitute.org/state-occupational-licensing-index-2023/, March 20, 2023.
 President Obama White House, Occupational Licensing: A Framework for Policymakers, https://obamawhitehouse.archives.gov/sites/default/files/docs/licensing_report_final_nonembargo.pdf, July 2015.
 Peter Blair and Bobby Chung, (2019), How Much of Barrier to Entry is Occupational Licensing?. British Journal of Industrial Relations, 57: 919-943
 Evgeny Vorotnikov and Morris Kleiner, (2018), At What Cost? State and National Estimates of the Economic Costs of Occupational Licensing., Institute for Justice, https://ij.org/report/at-what-cost/#:~:text=By%20a%20conservative%20measure%20of,reach%20%24184%20billion%20or%20more.
 D. Mark Anderson, Ryan Brown, Kerwin Kofi Charles, and Daniel I. Rees, (2020), Occupational Licensing and Maternal Health: Evidence from Early Midwifery Laws., Journal of Political Economy, 128(11): 4337-4383.
 Morris Kleiner and Maria Koumenta (Eds.). (2022). Grease or grit? International case studies of occupational licensing and its effects on efficiency and quality. Kalamazoo, MI: W.E. Upjohn Institute for Employment Research.