Empirical research suggests that - rather than improving incentives - exerting controlcan reduce workers' performance by eroding motivation. The present paper shows thatintention-based reciprocity can cause such motivational crowding-out if individuals differin their propensity for reciprocity...

This paper studies network formation in settings where players are heterogeneous with respect to benefits as well as the costs of forming links. Our results demonstrate that centrality, center-sponsorship and short network diameter are robust features of equilibrium networks. We find that in a...

We study the impact of advice or observation on the depth of reasoning in an experimental beauty-contest game. Both sources of information trigger faster convergence to the equilibrium. Yet, we find that subjects who receive naïve advice outperform uninformed subjects permanently, whereas...

This discussion paper led to an article in <I>Games and Economic Behavior</I> (2011). Vol. 72, pp. 594-601.<P> There is by now a large literature arguing that auctions with a variety of after-market interactions may not yield an efficient allocation of the objects for sale, especially when the bidders...</p></i>

This discussion paper resulted in a publication in <A href="http://link.springer.com/article/10.1007%2Fs11238-010-9196-5">'Theory and Decision'</A>, 2011, 71(2), 269-295.<P> Unique-lowest sealed-bid auctions are auctions in which participation is endogenous and the winning bid is the lowest bid among all unique bids. Such auctions admit very many Nash equilibria (NEs) in...</p></a>

This discussion paper resulted in a publication in the <I>Journal of Economic Behavior & Organization</I> (2008), volume 66, pages 243-250.<P> We study fairness and reciprocity in a Hawk-Dove game. This alllows us to testvarious models in one framework. We observe a large extent of selfish and...</p></i>

This discussion paper led to a publication in the <I>Journal of Institutional and Theoretical Economics</I> (2010). Vol. 166, issue 2, pages 286-298. <P> A simultaneous pooled auction with multiple bids and preference lists is a way to auction multiple objects, in which bidders simultaneously express a...</p></i>

This discussion paper led to a publication in <A href="http://www.sciencedirect.com/science/article/pii/S0899825611001151">'Games and Economic Behavior'</A>, 74(1), 399-406. <P>The Babylonian bridal auction, described by Herodotus, is regarded as one of the earliest uses of an auction in history. Yet, to our knowledge, the literature lacks a formal equilibrium analysis of this...</p></a>

See the article with the same title in the 'Economic Journal' (2003), 113, 598-614.<p> The objects for sale in most auctions possess both private and common value elements. This salient feature has not yet been incorporated into a strategic analysis of equilibrium bidding behaviour. This paper...</p>

This paper presents a unified framework for characterizing symmetric equilibrium in simultaneous move, two-player, rank-order contests with complete information, in which each player's strategy generates direct or indirect affine "spillover" effects that depend on the rank-order of her decision...