“…Although the name of this factor for each study differs, all investigations refer to Gross Domestic Product, either it is called Market size (Mateev, 2009;Riedl, 2010;Sharma & Bandara, 2010;Khachoo & Khan, 2012), Economic size (Tang, 2011), The size of the economy (Jurcau et al, 2011), Size of domestic market (Arbatli, 2011), or directly GDP (Hayakawa et al, 2013;Kersan-skabic, 2013). Nevertheless, the methodology is different, as for example: Sharma & Bandara (2010) and Riedl (2010) apply the level of GDP in currency units, Mateev (2009) and Kersan-Skabic (2013) use GDP per capita, other researchers use the logarithm of GDP (Tang, 2011;Jurcau et al, 2011).…”