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跳跃投标是增价拍卖一种普遍现象,而跳跃投标是否会带来投标方的期望收益的增加是一个值得关注的问题。通过运用博弈论方法,分别寻找单物品和多物品拍卖两种情形下的跳跃报价均衡,计算出跳跃报价均衡下的投标方期望收益,并将其结果与非跳跃报价情形进行比较,给出了投标方希望通过跳跃出价改善其期望收益的一般条件。
Jumping bidding is a common phenomenon of price increase auction, and jumping bidding will bring about the increase of bidder’s expected return. This is a concern. By using the game theory, we find the equilibrium of the jump bidding under single item and multi-item auction, and calculate the expected bid of the bidder under the equilibrium of the jumping bidding price, and compare the result with that of the non-jump bidding. Bidders hope to improve their expectations of the general conditions of the profit by jumping bids.