What does "award citation" means here?Does it refer to a person who is giving Shapley the award?
The award citation said Shapley had used game theory to study and compare various matching methods.

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An award citation is a certificate that describes the reason for giving the award.
So, no, it's not a person; it's a piece of paper or a plaque.

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sorry if nobody understands whats goin' on,actually he's the guy who got nobel prize for economics 2012,i read this article in a newspaper.