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The Laffer curve is typically represented as a graph which starts at 0 % tax with zero revenue , rises to a maximum rate of revenue at an intermediate rate of taxation , and then falls again to zero revenue at a 100 % tax rate .
 Laffer
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Laffer