An Introduction to Travel Intermediaries -- Origins of the Global Distribution Systems (1925 – 1983) -- GDS: Platform Power (1984 – 1995) -- GDS: The Internet, New Channels and Transparency (1996 – 2011) -- Scale Matters: GDS Air Shopping -- GDS: The Turbulent Years (2012 – Present) --...

We investigate whether online travel agents (OTAs) assign hotels worse positions in their search results if these set lower hotel prices at other OTAs or on their own websites. We formally characterize how an OTA can use such a strategy to reduce price differentiation across distribution...