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In many applied mechanisms, notably auctions, participants do not only care about winning and their payment but also about the information that their bidding performance discloses to others. The inferences of the outsiders about the qualities of a bidder depend on the available information and the format of the auction, and then affect the bidding behavior. We would like, thanks to theoretical and experimental analysis, to provide new perspectives for economic regulation (public procurements) and allocation mechanisms, such as auctions but not only, used in organizations (charitable organizations, art auction houses). Especially, we would like to understand how the signaling device affects the bidding behavior and then the revenue and efficiency properties in the optimal (revenue-maximization) mechanisms.