Final answer:
The true or false statement cannot be accurately confirmed without more context about the specifics of the dealing between lean producers and U.S. mass producers with their dealers and customers.
Step-by-step explanation:
The statement that lean producers and U.S. mass producers differ as much in their dealings with dealers, distributors, and customers as they do with their suppliers is difficult to assess with absolute certainty without more context. However, it is broadly known that lean production methods, which originated in Japan, often involve closer relationships with suppliers and a focus on just-in-time inventory systems, which can extend to relations with dealers and distributors as well. Conversely, traditional U.S. mass production methods might involve less integration across these entities. Given the general phrasing of the statement, an accurate answer cannot be provided based on the intervention principle that is incorporated in the theory of the firm, which is about the trade-off between economies of scale and reduced competition. That said, the related topic of the market revolution in the United States, which did indeed bring about significant social and economic changes, is true.