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He is also Professor of Law at the Law School , a senior research fellow at the American Bar Foundation , and a research associate at the National Bureau of Economic Research .
 Law School, American Bar Foundation, National Bureau of Economic Research
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Law School, American Bar Foundation, National Bureau of Economic Research