Earlier quoted context omitted.
> If your prediction is that this will result in a welfare loss to consumers I would ask that you offer some evidence. For what it's worth a company that is valued at between 1.5 and 2 trillion usd has to come with evidence of how it isn't a monopoly/abusing its monopoly position, we can't reasonably talk about a "free market" when those numbers are involved. I'm not an economist and I'm not good with remembering nam…
It feels like the aversion to the "trillion" market value is strictly psychological in response to an arbitrary order of magnitude. Keep in mind that the total value of all US companies combined as of March 2021 is $49 trillion ( https://siblisresearch.com/data/us-stock-market-value/); Amazon represents just 4% of that. If we were to try to define Amazon's market, there's no reasonable definition you could come up wi…
> Amazon has well over half of US book sales, and probably three quarters of ebook sales. So if we’re arguing about how Amazon runs its books business, it unquestionably has market dominance. You have to pull out a segment, not the whole company.
To speak more generally, my understanding is that arguments that Amazon is a monopolist are stronger when we focus on Amazon Marketplace than on (say) AWS, partly because there are many "segments" in which almost all products are sold through Amazon. But I wish that I had more data about this particular claim.