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The provision of licenses and the agencies that mandate them are often criticised by libertarians , like Milton Friedman , for creating an anticompetitive environment for occupations , which creates a barrier to entry for more qualified and skilled individuals who may not have the resources to obtain the necessary licences .
 Milton Friedman
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Milton Friedman