The growing literature exploring the emergence of modern marketing has concentrated on the periodization of different marketing techniques coming into usage, the retailing of different product categories, the internationalization of retail formats, and advertising practices. 1 But recent research has begun to focus on deliberate attempts to elicit consumer spending on novel products by firms and marketing specialists. This more recent literature explores how specialists, in particular designers and market researchers, in the middle decades of the twentieth century began to move away from a product-focused approach to one that placed the consumer at the center of marketing initiatives. This development was also associated with the move away from marketing as simply a promotional activity toward strategic marketing instead. Now marketing management informed the entire organization of activities within the firm. 2 The near paradox of this mid-century movement was that while its adherents were intent on the primacy of consumer interests, consumer agency was viewed with suspicion. In 1952, the German-American market researcher Alfred Politz emphasized that "consumers do not know what they want and why they act." 3 With consumers so resistant to the active search for answers to their problems, specialists had to step in to diagnose and solve their problems for them. 4 These specialist market researchers and product designers developed tools and techniques to elicit the explication of previously unarticulated consumer preferences. This was consumer engineering.The historical debates on consumer engineering, on whether or not it was beneficial to or exploitative of consumers, are summarized elsewhere in this volume. This chapter aims to use economic reasoning to explain why consumer engineering was so successful.