If you look at pages 173-8 in my recent book (attached below), you get an answer: external conficts are nowdays almost extinct and terrorism have minor impacts, so the major impact arises from internal confict. However, we have to remember that in many connections an internal confict is named as terrorism. Also, I have proved that the poverty in many poor countries is partially due to internal conflicts.
Book Missing a Decent Living for Everyone: Success and Failure in...
We cannot deny the potential of impact of conflicts on economic performance. As Veli indicated, conflict in all cases poses greater difficulty for economic development or performance. Indeed, Conflict by its definition may not necessarily present the impacts on the economy. You may wish to know if the conflict has manifested into violence (violent conflict), the economy of the state, the region or the community experiencing the conflict. I think that, whole the overall national economic performance may be impacted negatively, the various regions and communities engaged in the conflict situation may see a boom, normally as a result of illicit trade in hard natural resources found in those locations. Naturally, the boom may not be communal so long as it is a very few of the elites and such powerful individuals who become rich and can say that, they have not been negatively affected by the conflict. However, the state/region or community is largely affected negatively by such violent conflicts since these situations lead to destruction of social and economic infrastructure.
If you look at tourism economics literature than certainly external conflict would be of major importance. In 1982 the number of international arrivalls dropped becouse of (among others) Falklands Conflict. Those external conflicts often have external effects. E.g. after 11/9 there was a worldwide downturn in air passenger traffic, even in local connections.
Many authors see all three conflicts you mentioned as more devastating to tourism economics than economic downturn.
I agree with Veli. Internal conflict (civil wars) have the greatest destructive impact because they simply last longer and in many cases have the potential to be ignored by the international community for longer periods of time. Terrorism is many times a tool of weaker parties in internal wars, whether in country or against high value assets outside the country. These events are very rare and more easily countered, particularly when the targets are Westerners. Pls read John Mueller (2006) "Overblown". New York. Free Press.
I agree with Indra internal conflict including political, ethnic and religious clashes among different groups always negatively affect the economy of that state or area such as Afghanistan, Pakistan, Iraq, syria and many other areas of the world. Please read article available on following website on basics of causes and effects of terrorism especially in developing societies: