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Geoffrey F. Miller, The Mating Mind, Psycoloquy, 12(008), 2001.
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Bryan Caplan, Expressive Voting, Econ 849 course notes, GMU, 2001.
Kenneth Green and Phillip Nelson, If extremists vote how do they express themselves? An empirical test of an expressive theory of voting, Public Choice 113:425–436, 2002.