Summary: The third essay considers the incentives of an auctioneer to reveal information in a private value auction. Suppose the auctioneer possesses information that affects agents' payoffs but is independent of their signals, and who can commit to a revelation strategy. When there are only two bidders, releasing this information always makes the seller worse off in an English auction. However if there are enough bidders this effect is reversed, and revelation will benefit the auctioneer. While the dividing line can vary, in two examples the auctioneer is shown to be indifferent between releasing information and not when there are three bidders. These results can be extended to other standard auctions, and are shown to parallel the bundling decision in a multi-unit auction.