“…many of the studies, using the gravity model of trade, analyse the general question of the trade flows between one country and its trade partners or the region with an attempt to determine the key factors to that trade (kristjánsdóttir, 2005;Papazoglou, 2007;Lampe, 2008;Pietrzak & Lapinska, 2014). other studies look more specifically to the trade flows of certain products (Pelletiere & Reinert, 2004;Sarker & Jayasinghe, 2007). Studies also focus on different policy implications and factors that affect the trade flows between countries, for example, the effects of common currency (Bun & Klaassen, 2007), foreign direct investments (Gopinath & Echeverria, 2004), natural border effects (Nitsch, 2000), and transportation costs (martinez & Suarez, 2005;egger, 2008).…”