If budget planning requires gathering information from people who may not always have the incentive to disclose that information, then the principles of mechanism design can definitely be of use in such planning.
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About Eric Maskin
Eric Maskin was American nobel laureate in economics. Eric Stark Maskin is an American economist and mathematician. He was jointly awarded the 2007 Nobel Memorial Prize in Economic Sciences with Leonid Hurwicz and Roger Myerson "for having laid the foundations of mechanism design theory". Read more on Wikipedia →