Template-type: ReDif-Paper 1.0 Author-Name: Kirchkamp Oliver Author-Name: Reiss J. Philipp Author-Name: Sadrieh Abdolkarim Author-workplace-name: METEOR Title: A pure variation of risk in first-price auctions Abstract: We introduce a new method of varying the risk that bidders face in first-price private value auctions. We find that decreasing bidders’ risk significantly reduces the degree of overbidding relative to the risk-neutral Bayesian-Nash equilibrium prediction. This implies that risk affects bidding behavior as generally expected in auction theory. While resolving a long-standing debate on the effect of risk on auction behavior, our results give rise to a new puzzle. As risk is diminished and overbidding decreases for most of the value range, a significant degree of underbidding sets in for very low values Keywords: Economics (Jel: A) Series: Research Memoranda Creation-Date: 2006 Number: 058 File-URL: http://digitalarchive.maastrichtuniversity.nl/fedora/objects/guid:68d923b2-1200-4d18-8b89-377c7a6b9a4e/datastreams/ASSET1/content File-Format: application/pdf File-Size: 209252 Handle: RePEc:unm:umamet:2006058