A. When bids for an item are based on estimates of the item's value, the winner is the bidder who overestimates this value the most.
B. Intuitively, most people bid more aggressively when faced with more bidders, but more aggressive bidding increases the chances that a bidder will fall victim to the winner's curse.
C. The mathematical explanation for the winner's curse, first observed in bidding for oil fields, reveals the subtle intricacies of this apparently simple game.
D. The classroom experiment demonstrating the winner's curse illustrates the complex relationship between game theory, human intuition, and optimal decision making.