The theory of the niche predicts that a new medium will compete with established media for consumer satisfaction, consumer time, and / or consumer advertising dollars. Competition between e-mail and telephone use was measured in this study at the level of gratifications derived by consumers. Gratifications and gratification opportunities (consumers' beliefs that a medium allows them to obtain greater opportunities for satisfaction) were derived from an analysis of open-ended questions. A second sample was interviewed by telephone and rated both mediums on gratification and gratification-opportunity scales. Forty-eight percent of respondents reported using the phone less since they adopted e-mail. Results indicate that a wider spectrum of needs is being served by the telephone, whereas e-mail provides greater gratification opportunities. The results indicate competition, but also indicate that the two mediums are not close substitutes.

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Given that many cohabiting couples marry, our interest was in the changes that may accompany this shift in terms of relational and individual well-being. In addition, a comparison among three relationship groups was undertaken: those who entered directly into marriage, those who cohabitated and then married, and those who are long-term cohabiters. Also, comparisons across time were conducted. Our data were drawn from the 1987–1988 and 1992–1994 National Survey of Families and Households. A sub-sample of the data was utilized to create the three groups matched on multiple demographic variables. The shift to marriage was not accompanied by significant changes in any of the constructs of interest. Differences among the groups were consistent with previous research. The major findings indicated a significant effect for time, regardless of relationship group. Companionship, sexual interaction, relational satisfaction, and commitment decreased across time. The frequency of conflict and arguing heatedly increased, while remaining calm and keeping opinions to one’s self decreased.