SLIDES OF INVITED DISCUSSIONS

· Discussion of Athey, Mobius and Pal(2014) and Palermo et al. (2014) Third Annual Conference on Internet Search and Innovation, Northwestern University, Searle Center

· Discussion of Shi (2013)  QME Conference, University of Chicago (available upon request)

· Discussion of Katona et al.  (2013)  Summer Institute on Competitive Strategy, UC Berkeley (available upon request)

· Discussion of Kummer et al. (2013) 11th Conference on Economics of ICT, European Center for Economic Research, University of Mannheim