1. The Market for 'Lemons': Quality Uncertainty and the Market Mechanism;George A Akerlof;Quarterly Journal of Economics,1970
2. Here, organized by occupation, we discuss choices that this undertaking required, as well as the sources beyond the NCSL and IJ that we consulted. 0540 (claims adjusters, appraisers, examiners, and investigators);recording policy information from the National Conference of State Legislatures (NCSL) and the Institute for Justice (IJ)
3. We recorded information on "mandatory certification" (i.e., licensing) from PhlebotomyExaminer.com, which we found had uniquely detailed information on the statespecific training, certification, and licensing regimes for phlebotomists. 37 4520 (miscellaneous personal appearance workers). We used information from the U.S. Bureau of Labor Statistics Occupational Employment Statistics program on occupations in the 5-digit SOC code 39-5090 (also "miscellaneous personal appearance workers"). These were "makeup artists, theatrical and performance" "manicurists and pedicurists;35 which describes itself as a nonprofit organization to advance "mutual professional interests of librarians and other library workers" and which is specialized in librarian licensing and certification efforts,2017