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February 2006, Robert Axtell, Steven Durlauf, Joshua M. Epstein, Ross A. Hammond, Ben Klemens, Jon Parker, et al.
February 2006, Robert Axtell
April 2002, Robert Axtell
November 2000, Robert Axtell
February 2000, H. Peyton. Young, Joshua M. Epstein and Robert Axtell
June 1999, Robert Axtell
May 1999, Joshua M. Epstein and Robert Axtell
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