Didn't Ronald Coase's theory of the firm predict this, right after the first world war?
(As transaction costs (search costs, costs to contract, costs to outsource, etc.) go down, optimal firm size goes down. In an efficient market for contracting, like IT, tiny startups turn into long-term profitable small-headcount companies (dropbox has, what, 70 people?). In inefficient markets, you end up with huge or state-owned companies, like in natural resource exploitation or the third world.)
(As transaction costs (search costs, costs to contract, costs to outsource, etc.) go down, optimal firm size goes down. In an efficient market for contracting, like IT, tiny startups turn into long-term profitable small-headcount companies (dropbox has, what, 70 people?). In inefficient markets, you end up with huge or state-owned companies, like in natural resource exploitation or the third world.)