Universal service obligations in the postal sector: The relationship between quality and coverage. - Joan Calzada (Inf. Econ. Policy, 2009)

Intertemporal Movie Distribution: Versioning When Customers Can Buy Both Versions. - Joan Calzada; Tommaso M. Valletti (Mark. Sci., 2012)

Broadband prices in the European Union: Competition and commercial strategies. - Joan Calzada; Fernando Martínez-Santos (Inf. Econ. Policy, 2014)

What Do News Aggregators Do? Evidence from Google News in Spain and Germany. - Joan Calzada; Ricard Gil (Mark. Sci., 2020)