New Dilemmas for the Prisoner » American Scientist
http://www.americanscientist.org/issues/pub/new-dilemmas-for-the-prisoner
New Dilemmas for the Prisoner: Weird things happen with repeated iterations of the #PrisonersDilemma
http://www.americanscientist.org/issues/pub/new-dilemmas-for-the-prisoner #gametheory