Amazon might seem anathema to small business, but the fact is, third-party sellers account for the majority of the e-commerce giant’s sales. These sellers range from independent artisans and designers to opportunistic resellers of products from big-box stores. A new report from the nonprofit Data & Society examines how Amazon is helping, hurting and generally transforming the small business retail model. Marketplace’s Meghan McCarty Carino spoke with Moira Weigel, the author of the report and a professor at Northeastern University. She described the effect Amazon has on small businesses as a “trickle-down monopoly.”

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