Taschdjian, Martin; Alleman, James H. - 2018
-sided markets, their economic rents are "hidden" from the public . On the user side of the market, prices are zero – "free." The … (HHI) are high, indicating a concentrated market or highly concentrated market by several different definitions of their … markets. For example, Google has 93 percent of the search market. Combined Google and Facebook currently control over half of …