Ravi Bapna Paulo B. Goes Alok Gupta Gilbert G. Karuga Predicting Bidders' Willingness to Pay in Online Multiunit Ascending Auctions: Analytical and Empirical Insights. 345-355 2008 20 INFORMS Journal on Computing 3 http://dx.doi.org/10.1287/ijoc.1070.0247 db/journals/informs/informs20.html#BapnaGGK08