-of these markets. Allowing for general fee structures, we show that their impact on incentives and efficiency in large Double …Fees are omnipresent in markets but, with few exceptions, are omitted in economic models-such as Double Auctions …-ask spread fees). Double Auctions with homogeneous fees share the key advantages of Double Auctions without fees: markets with …

's available actions. Principals demand robustness and evaluate contracts on a worst-case basis. This robust approach allows for a … common agency by constructing a pseudo-potential for the game. Robust contracts make explicit how the efficiency of the …

the MPW rule is the unique rule satisfying \textit{strategy-proofness}, \textit{efficiency}, \textit …

class of rules satisfying the properties, and find the tension between minimal properties of efficiency, fairness, and …

constraints. We show that the generalized Vickrey rule is the only rule satisfying efficiency, strategy-proofness, individual …

auctions. We analyze incentives for bidders to manipulate the auction outcome and adapt the design to prevent this behavior …

asymptotically efficient. Asymptotic efficiency is achieved by estimating demand and supply using information from the bids of …