Dobzinski, Shahar; Nisan, Noam - In: Journal of Economic Theory 156 (2015) C, pp. 14-44
We study environments with m homogenous items and two bidders, where the private information of each bidder consists of a monotone valuation (multi-unit auctions). We analyze ex-post implementable social choice functions where the dominant strategy of a bidder is to reveal his valuation.