Date: 22 September 2016Time: 11.00-12.30Room: Chair: Vili Lehdonvirta Michael Castelle: The Platform as Exchange: Financial Metaphors for the Regulation of Marketplace Platforms David Nieborg, Anne Helmond: From web to apps. A platform studies approach to Facebook’s political economy Jean-Christophe Plantin, Alison Powell: Open maps, closed knowledge: what the platformisation of maps means for citizenship and society Tarleton Gillespie, Mike Ananny: Exceptional Platforms ‹ Track B: Governance up Michael Castelle: The Platform as Exchange: Financial Metaphors for the Regulation of Marketplace Platforms ›