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| Guyer   | R Documentation   |
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Anonymity and Cooperation
-------------------------

Description
~~~~~~~~~~~

The ``Guyer`` 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.

Usage
~~~~~

::

    Guyer

Format
~~~~~~

This data frame contains the following columns:

cooperation
    Number of cooperative choices (out of 120 in all).

condition
    A factor with levels: ``A``, Anonymous; ``P``, Public-Choice.

sex
    Sex. A factor with levels: ``F``, Female; ``M``, Male.

Source
~~~~~~

Fox, J. and Guyer, M. (1978) Public choice and cooperation in n-person
prisoner's dilemma. *Journal of Conflict Resolution* **22**, 469â€“481.

References
~~~~~~~~~~

Fox, J. (2008) *Applied Regression Analysis and Generalized Linear
Models*, Second Edition. Sage.

Fox, J. and Weisberg, S. (2011) *An R Companion to Applied Regression*,
Second Edition, Sage.
