Prove that, in a vickrey (second-price sealed-bid) auction, for any false bid bi by any single bidder (that is, if vi is the bidder's private value for the item, then bi≠vi), there exists a vector b−i of bids by all other bidders such that the false bid gives strictly worse utility than bidding the true valuation, that is, ui(bi, b−i)

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it established new limitations on use and disclosure for marketing purposes, prohibited selling medical information, expanded individuals’ rights to accessing their own information, and to obtain restrictions from certain disclosures of protected heath information to health plans.