We study the correlation of choice under risk in Holt-Laury lotteries for gains and losses with gender, the use of … the digit ratio (2D:4D) in more than 200 subjects. In males, salivary testosterone is negatively correlated with risk … aversion for gains only. In females, salivary cortisol is positively correlated with risk aversion for gains only. No other …

overbidding in auctions. As a workhorse we use the second-price all-pay and the first-price winner-pay auction. Both risk and …In this paper we use an experiment to compare a theory of risk aversion and a theory of spite as an explanation for … spite can be used to rationalize deviations from risk neutral equilibrium bids in auctions. We exploit that equilibrium …

Overbidding in auctions has been attributed to e.g. risk aversion, loser regret, level-k, and cursedness, relying on …

second-price auctions. Overbidding is a robust finding in second- price auctions, and spite among bidders has been advanced … where bidders have preferences regarding both, the payoffs of other bidders and the seller's revenue. Overbidding is optimal … seller on overbidding. We conclude that overbidding is not an artefact of the standard experimental implementation of second …