Tests of theory in marketing and consumer behavior research are frequently based on convenience samples of undergraduate college students. In a study of business-related ethicality, analysis of data from four dozen convenience samples of undergraduate business students revealed significant...

Existing single-adoption diffusion models assume a static (constant) ceiling on the number of adopters, that is, a constant population of potential adopters, over the entire time frame of the diffusion process. However, for most innovations this assumption is tenuous. Rather, the ceiling, or the...