article

Keep, William W., and Peter J. Vander Nat — Multilevel Marketing and Pyramid Schemes in the United States: An Historical Analysis.

Keep, William W., and Peter J. Vander Nat. "Multilevel Marketing and Pyramid Schemes in the United States: An Historical Analysis." *Journal of Historical Research in Marketing* 6, no. 2 (2014): 188–210.

Focus in observatory

Related books

Book

When Trust Stops Tracking Reality

Why Good Intentions Sometimes Become Harmful

How trust drifts from evidence when good intentions stop learning from feedback—through the fictional arc of Calder Family Health and real institutional patterns.