Key points are not available for this paper at this time.
The Impact of State Licensing Regulations on Low-Skilled Immigrants: The Case of Vietnamese Manicurists by Maya N. Federman, David E. Harrington and Kathy J. Krynski. Published in volume 96, issue 2, pages 237-241 of American Economic Review, May 2006
Federman et al. (Sat,) studied this question.