hi. some times political drives leads international business. some countries intend to control the world by being a strong competitor in international markets. some others engage in it due to their saturated market in home country. others want to be the great members of global trade . best
Ease of doing business - energy, affordable labour, potential market (including income levels of the general populace), communication channels (transport modals and cellphones, internet etc)
Tax Rates - Tax Havens are economies which offer low tax rates on profits which can enable firms declare huge dividends to its shareholders and grow organically.
Cultural congruence allowing investors of different race, beliefs etc to operate freely. Investors must also be flexible and respect the locals for cordial business relationships.