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<table width="100%" summary="page for Guyer"><tr><td>Guyer</td><td align="right">R Documentation</td></tr></table>

<h2>Anonymity and Cooperation</h2>

<h3>Description</h3>


<p>The <code>Guyer</code> data frame has 20 rows and 3 columns.
The data are from an experiment in which four-person groups
played a prisoner's dilemma game for 30 trails, each person
making either a cooperative or competitive choice on each
trial. Choices were made either anonymously or in public;
groups were composed either of females or of males.
The observations are 20 groups.
</p>


<h3>Usage</h3>

<pre>
Guyer
</pre>


<h3>Format</h3>


<p>This data frame contains the following columns:
</p>

<dl>
<dt>cooperation</dt><dd>
<p>Number of cooperative choices (out of 120 in all).
</p>
</dd>
<dt>condition</dt><dd>
<p>A factor with levels:
<code>A</code>, Anonymous;
<code>P</code>, Public-Choice.
</p>
</dd>
<dt>sex</dt><dd>
<p>Sex.  A factor with levels:
<code>F</code>, Female;
<code>M</code>, Male.
</p>
</dd>
</dl>



<h3>Source</h3>


<p>Fox, J. and Guyer, M. (1978)
Public choice and cooperation in n-person prisoner's dilemma.
<EM>Journal of Conflict Resolution</EM> <B>22</B>, 469&ndash;481.
</p>


<h3>References</h3>


<p>Fox, J. (2008)
<EM>Applied Regression Analysis and Generalized Linear Models</EM>,
Second Edition. Sage.  
</p>
<p>Fox, J. and Weisberg, S. (2011) 
<EM>An R Companion to Applied Regression</EM>, Second Edition, Sage.
</p>


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