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Gravity equations : workhorse, toolkit, and cookbook
Head, Keith, (2013)
The gravity equation, market size, and black market exchange rates
Larue, Bruno, (1993)
Non-Europe: the magnitude and causes of market fragmentation in the EU
Head, Keith, (2000)
Effet frontière, intégration économique et "Forteresse Europe"
Head, Keith, (2001)
The empirics of agglomeration and trade
Head, Keith, (2003)