We investigate bidder collusion in one-sided ascending price auctions without communication. If bidding rules in an English-type auction allow bidders to match each others' bids, collusion can be sustained as a Nash equilibrium of a one-shot auction game. Our earlier experiments show that in common value auctions with complete information, collusion does occur and is sustainable even when bidde...

We define the class of two-player zero-sum games with payoffs having mild discontinuities, which in applications typically stem from how ties are resolved. For games in this class we establish sufficient conditions for existence of a value of the game and minimax or Nash equilibrium strategies for the players. We prove first that if all discontinuities favor one player then a value exists and t...

In multiagent systems, social choice functions can help aggregate the distinct preferences that agents have over alternatives, enabling them to settle on a single choice. Despite the basic manipulability of all reasonable voting systems, it would still be desirable to find ways to reach plausible outcomes, which are stable states, i.e., a situation where no agent would wish to change its vote. ...

We study Nash implementation by natural price-quantity mechanisms in pure exchange economies with free-disposal (Saijo et al., 1996, 1999) where agents have weak/strong intrinsic preferences for honesty (Dutta and Sen, 2012). Firstly, the Walrasian rule is shown to be non-implementable where all agents have weak (but not strong) intrinsic preferences for honesty. Secondly, the class of effi cie...

We use Hotelling’s spatial model of competition to investigate the positiontaking behaviour of political candidates under a class of electoral systems known as scoring rules. In a scoring rule election, voters rank all the candidates running for office, following which the candidates are assigned points according to a vector of nonincreasing scores. Convergent Nash equilibria in which all candi...

So far, most studies on networked evolutionary game have focused a single update rule. This paper investigated the seeking of Nash Equilibrium and strategy consensus with mixed updating rules. First, we construct algebraic formulation for dynamics by using semi-tensor product method. Second, based form, dynamic behavior games is discussed, an algorithm to seek equilibrium proposed. Third, inves...

Objective(s):Non-alcoholic steatohepatitis (NASH), is an important component of Non-alcoholic fatty liver disease (NAFLD) spectrum, which progresses to the end stage liver disease, if not diagnosed and treated properly. The disproportionate production of pro- and anti-inflammatory adipokines secreted from fat contributes to the pathogenesis of NASH. In this study, the comparative effect of piog...

A monopolist seller has multiple units of an indivisible good to sell over a discrete,finite time horizon. Potential buyers with unit demand arrive and depart over thisperiod. Each buyer privately knows her arrival time, her value for a unit and the timeby which she must make a purchase. We study the revenue maximizing Bayes-Nashincentive compatible allocation rule. The allocati...