Cooper, Russell W., 1955-Corbae, Dean2011-08-242017-05-112011-08-242017-05-112007-05http://hdl.handle.net/2152/13315textelectronicengCopyright is held by the author. Presentation of this material on the Libraries' web site by University Libraries, The University of Texas at Austin was made possible under a limited license grant from the author who has retained all copyrights in the works.Diversification in industry--Mathematical modelsConsumers' preferences--Mathematical modelsSupply and demand--Mathematical modelsCompetition--Mathematical modelsDuopolies--Mathematical modelsTechnological innovations--Mathematical modelsConsumer credit--Mathematical modelsDefault (Finance)--Mathematical modelsCredit ratings--Mathematical models