Contribution of the Article
Because our article incorporates elements from several liter- ature streams within the marketing literature, it is useful to point out the relative contribution of the article. Table 1 shows the contribution of this article with respect to several streams of literature that influenced the return on marketing conceptual framework. Table 1 shows related influential lit- erature streams and exemplars of the stream, and it high- lights key features that differentiate the current effort from previous work. For example, strategic portfolio models, as Larreché and Srinivasan (1982) exemplify, consider strate- gic trade-offs of any potential marketing expenditures. How- ever, the models do not project ROI from specific expendi- tures, do not model competition, and do not model the behavior of individual customers, their customer-level brand switching, or their lifetime value. Our model adds to the
strategic portfolio literature by incorporating those
elements.