Profit-shifting in Two-sided Markets

We investigate how multinational two-sided platform firms set their prices on intra firm transactions. Two-sided platform firms derive income from two customer groups that are connected through at least one positive network externality from one group to the other. A main finding is that even in the absence of taxation transfer prices deviate from marginal cost of production. A second result of the paper is that it is inherently difficult to establish arm's length prices in two-sided markets. Finally, we find that differences in national tax rates may be welfare enhancing despite the use of such prices as a profit shifting device