Two-Sided vs. Complementary Products

By Lapo Filistrucchi – 

In his dissenting opinion in Ohio et al. vs American Express, Justice Breyer seems to call for a clarification, from Filistrucchi et al. (2014) on the distinction between products sold by two-sided platforms and complementary products. The question however has been lingering also in economic circles. In fact, it has often been the case in the past years that colleagues working in different fields have (often wrongly, but not always so) commented to me that two-side