D'Annunzio, Anna; Mardan, Mohammed; Russo, Antonio - 2019
card platforms, adopt multi-part tariffs. We show that ad valorem taxes can correct underprovision and hence increase … result in different settings, including vertically interlinked markets, markets where firms adopt menus of tariffs to screen … consumers and where they compete with multi-part tariffs. Our results suggest that exempting these markets from taxation may be …