Charles T. Hill, Zick Rubin, Letitia Anne Peplau, Susan G. Willard, The Volunteer Couple: Sex Differences, Couple Commitment, and Participation in Research on Interpersonal Relationships, Social Psychology Quarterly, Vol. 42, No. 4 (Dec., 1979), pp. 415-420
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Hill et al. (1979) studied this question.
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