Omid Roozmand Mohammad Ali Nematbakhsh Ahmad Baraani-Dastjerdi An Electronic Marketplace Based on Reputation and Learning. 1-17 2007 2 JTAER 1 http://www.jtaer.com/apr2007/roozmand_nematbakhsh_baraani_p1.pdf db/journals/jtaer/jtaer2.html#RoozmandNB07