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It is thus also an answer to attempts by economists ( such as Gary Becker ) to bring economic approaches " – in particular utility maximisation and game theory " – to the analysis of social situations that are not obviously related to production or trade .
 Gary Becker
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
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Text: {0} 
Answer:
 Gary Becker