Robert Axelrod
<p class="default"><span style="color: #000000; font-size: 8pt; font-family: Arial;">Ongoing interaction </span></p>
<p class="default"><span style="color: #000000; font-size: 8pt; font-family: Arial;">with people who can identify each other </span></p>
<p class="default"><span style="color: #000000; font-size: 8pt; font-family: Arial;">with knowledge about past behavior. </span></p>
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<p class="default"><span style="color: #000000; font-size: 8pt; font-family: Arial;">Robert Axelrod on the minimal conditions for cooperation </span></p>