alt Hacker NewsWhy would you expect technological improvements to only shift supply curves right under perfect competition? I'd also expect it under oligopoly or even monopoly. You also might think there'd be more tech improvement under oligopoly, on Schumpeterian grounds that oligopolists can internalize the benefits of tech research.
A monopolist has no reason to decrease price because there is no competition. As we saw with Bell Labas in the US it is entirely possible for a monopoly to both have world class research and burry it for decades, viz. magnetic storage https://gizmodo.com/how-ma-bell-shelved-the-future-for-60-ye...
Oligopolists are in the same boat. But there needs to be a conspiracy to retard innovation. Something tech companies are only too happy to do: https://journals.law.unc.edu/ncjolt/blogs/wage-fixing-scheme...