https://www.whitehouse.gov/blog/2016/06 ... al-license
In 2015, over 22 percent of U.S. workers held an occupational license at the State, Federal, or local level, while around 26 percent held a license or a certificate. While licensing and certification seek to ensure that workers have the necessary qualifications, especially for occupations impacting consumer safety and well-being, overly-broad application of licensing requirements can create costly and unnecessary barriers to entering a profession. Licensing can lead to higher wages for those able to obtain a license, but can also lead to inefficiency and unfairness, including reducing employment opportunities and depressing wages for excluded workers, reducing workers’ mobility across State lines, and increasing costs for consumers. To address these challenges, the Administration is collaborating with States to encourage reforms that reduce licensing burdens for workers, while continuing to safeguard the well-being of the public, in line with best practices for licensing.

