[fanzhang]

I don't think that between firm inequality is the main driver of inequality within the US. (Internationally, inequality has decreased over the last 40 years). My personal belief is that the main causes are technology and globalization.

I think the article looks at it in a unique perspective that is missed. Between firm inequality is a result of technology, especially technology with natural monopoly characteristics (search, social network).

I don't think the article's recommendation of breaking up monopolies will reduce inequality at all. If you break Google or Facebook up, you'll get two companies with nearly isomorphic hiring and pay practices.