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<p>   (See below, however.)</p>

<p>Recent work  shows that the benefit-to-cost ratio must exceed the mean degree of nearest neighbors, <b>':<br/>
: <big>b / c > </big></b></p>

<p><big> Reciprocity in social dynamics </big></p>
<p>An ethical concept known as "generalized reciprocity" holds that people should show kindness to others without anticipating prompt return favors. This kind of reciprocity emphasizes the intrinsic value of humanitarian acts and goes beyond transactional expectations. In the field of <a href="page.php?w=social_dynamics">social dynamics</a>,</p><p>
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