Double Marginalization in Two-Sided Markets
45 Pages Posted: 8 Jan 2009
Date Written: July 2, 2008
Should banks (through Visa) be allowed to own debit clearing networks? This problem combines the classic Cournot (1838)-Spengler (1950) double marginalization problem with the more recent literature on two-sided markets (Rochet and Tirole, 2003). Because both the double marginalization (Weyl, 2008a) and two-sided markets (Weyl, 2008b) problems depend crucially on the pass-through rate, the analysis is natural and leads to strong over-identification given simple assumptions. Vertical integration does not generally erode (and often enhances) platform mark-ups. Therefore its (price level benefits) are more robust than those of competition in two-sided markets.
Keywords: two-sided markets, double marginalization, vertical relations, pass-through
JEL Classification: L42, D42, D43
Suggested Citation: Suggested Citation