Export of trade

[Geofrey Mubofu]

Hello everyone, am currently doing my dissertation about Africa Intra trade among African countries and the rest of the world Tanzania as a case study I spoke to my tutor we came to an agreement making an equation explaining the relationship of exports from Tanzania to Africa as a dependent variable I have gathered several dataset and combined them but I still think I need more independent variables to explain the export variable so far I have Tanzania gdp and Africa gdp also included a dummy variable if a country is in economic integration in this case I have included EAC and SADC and another dummy for land locked countries in Africa as well there is also another relationship of Tanzania with the rest of the world the dependent variable is Tanzania export to rest of the world what variables can I add to explain this relationship thank you in advance.