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Two tales on resale
Höffler, Felix, (2007)
Incentives and anonymity principle : crowding out toward users
Crifo, Patricia, (2004)
Business models for media firms : does competition matter for how they raise revenue?
Kind, Hans Jarle, (2009)
Microeconomic analysis
Varian, Hal R., (1992)
Varian, Hal R., (1978)
Intermediate microeconomics : a modern approach
Varian, Hal R., (1993)