Abstract: In the seller bidding of ordering statistics bidding function,define the expected deviation of the last non-winner’s price and the winner’s price as the bidding enterprise income,and  it is a decrease function on the number of bidder.Based on this result  supposing that the bidding function is a continuous cave function and the probably density function of the bidding price is decreasing function,the author studies the relations between last non-winner’s price and the winner’s price in generalized ordering statistics and gets a result that the expected deviation of the last non-winner’s price and the winner’s price decrease with the increase of the number of bidder in generalized ordering statistics.This study expands the conclusion from ordering statistics to generalized ordering statistics and provides the methods and theories for the research of bidding model.

Key words: ordering statistics, bidding price function, seller bidding, generalized ordering