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This article attempts to synthesize the contributions of Jagdish Sheth to the discipline. This is done by following the development of the field in various subdisciplines such that one can observe the impact Sheth's thinking has had on the field. This is the career of an “accidental marketer” who started as a social scientist, got interested in buyer behavior, and made his mark in that field. Noticing similarities between organizational buyer behavior and individual buyer behavior, he ventured into that field too. As a visionary, he started developing theories in international marketing in the seventies, which was a popular area that time. Similarly, he published a handbook on Customer Relationship Marketing and worked in the area before it became a major area of emphasis. As a multifaceted person, he has contributed to the practitioners through books and consulting projects. However, this article focuses mainly on his academic contributions including his research, teaching/mentoring, and his philanthropic activities.

This chapter adopts the midrange theories schema to expand Pels and Sheth (2017) matrix on business models to serve the low-income consumers (LIC): market adaptation, mission focus, radical innovation, and inclusive ecosystems. To this end, it identifies the underlying general business theories (systems theory and neo-classical economics) and ontological theories (positivism and interpretivist) nested in each of the matrix’s four cells.

Understanding the general theories from which concepts and guidelines are drawn allows a two-way contribution. On one hand, it comprehends which other concepts can be integrated into the LIC literature. Alternatively, it highlights what insights generated from the study of the LIC markets bring to these theories.

In my forty years of academic research, I have seen the scope of consumer behavior expanded in many directions, both theoretical and practical. One direction has been a dramatic growth beyond behavioral responses to marketing efforts and simple decision making to include the understanding of how consumers process and internalize information and respond to market stimuli at both conscious and subconscious levels.