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A 2006 survey of members of American Economic Association found that over two-thirds of economists support giving parents educational vouchers that can be used at government-operated or privately operated schools , and that support is greater if the vouchers are to be used by parents with low-incomes or parents with children in poorly performing schools .
 American Economic Association
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:
 American Economic Association