Analysis on Oil's Impact on Civil War and State Weakness
The analysis delves into the potential causal effects of oil on civil war and state weakness. By examining the observed data and establishing bounds, it suggests that oil could either significantly reduce wars or have a small positive effect. Furthermore, it explores how oil may lead to war through the mechanism of state weakness, with differing bounds indicating varying impacts. The study challenges assumptions and investigates the role of oil in conflict, providing insights into this complex relationship.
Download Presentation
Please find below an Image/Link to download the presentation.
The content on the website is provided AS IS for your information and personal use only. It may not be sold, licensed, or shared on other websites without obtaining consent from the author. Download presentation by click this link. If you encounter any issues during the download, it is possible that the publisher has removed the file from their server.
E N D
Presentation Transcript
Alexander Tabarrok (Based on Adam Glynn, Does Oil Cause Civil War Because it Causes State Weakness?)
State Weakness Oil Civil War
# of Obs Oil War CounterFactuals War(No Oil) Potential Causal Effects War(Oil)-War(No Oil) 16 1 0 {0,1} {0,-1} 3 1 1 {0,1} {1,0} Average Effect Bounds High bound: Suppose that in every case of oil and no war there would not have been a war without oil and that in every case of oil and war there would not have been a war without oil. 16/19*0+3/19*1=3/19. Low bound: Suppose that in every case of oil and no war there would have been a war without the oil and in every case of oil with war there would have been a war without oil. 16/19*-1+3/19*0=-16/19. Bounds on oil creates war {-16/19, 3/19}, i.e. data is compatible with oil having a big reduction in war or with a small positive effect on war.
# of Obs Oil SW CounterFactuals SW(No Oil) {0,1} Potential Causal Effects SW(Oil)-SW(No Oil) {0,-1} 19 1 0 9 1 1 {0,1} {1,0} Average Effect Bounds High bound: Suppose that in every case of oil and no SW there would have been no SW without oil and that in every case of SW with oil there would have been no SW without oil. 19/28*0+9/28*1=9/28. Low bound: Suppose that in every case of oil and no SW there would have been SW without the oil and in every case of SW with oil there would have been SW without oil. 19/28*-1+9/28*0=-19/28. Bounds on oil creates state weakness {-19/28, 9/28}, i.e. data is compatible with oil having a big reduction in SW or a fairly big positive effect on SW.
# of Obs Oil SW War Potential Causal Effects SW(Oil)-SW(No Oil) Potential Causal Effects War(SW)-War(No SW) Product: Oil causes War through SW 16 1 0 0 {0,-1} {0,1} {0,-1} 3 1 0 1 {0,-1} {0,-1} {0,1} 9 1 1 0 {0,1} {0,-1} {0,-1} 0 1 1 1 {0,1} {0,1} {0,1} Average Effect Bounds High bound: 3/28*1+0/28*1+16/28*0+9/28*0=3/28 Low bound: 16/28*-1+3/28*0+9/28*-1+0/28*0=-25/28 Bounds on oil creates war through state weakness {-25/28, 3/28}, i.e. data is compatible with oil having a big reduction in War through SW or a small positive effect on War through SW.
Monotone treatment assumption: Assume that SW cannot reduce chances of war. # of Oil Oil SW SW War Potential Causal Effects Potential Causal Effects Product: Oil causes War # of Obs Obs War Potential Causal Effects SW(Oil)-SW(No Oil) SW(Oil)-SW(No Oil) Potential Causal Effects War(SW)-War(No SW) War(SW)-War(No SW) Product: Oil causes War through SW through SW 16 16 1 1 0 0 0 0 {0,-1} {0,-1} {0,1} {0,1} {0,-1} {0,-1} 3 3 1 1 0 0 1 1 {0,-1} {0,-1} {0,-1} {0,-1 0} {0,1} {0,1 0} 9 9 1 1 1 1 0 0 {0,1} {0,1} {0,-1} {0,-1 0} {0,-1} {0,-1 0} 0 0 1 1 1 1 1 1 {0,1} {0,1} {0,1} {0,1} {0,1} {0,1} Note something a little odd. Where is potential evidence coming from that Oil causes War through SW? Consider the row with 3 obs. We have Oil, no SW, and war. Would seem to rule against hypothesis. But notice that the bounds are from Oil reduces SW & SW reduces War thus if Oil then SW and thus War (-1*-1=1). See also row with 9 obs. Oil could reduce or increase SW but suppose that we rule out that SW can decrease civil war. What then? High bound: 0 Low bound: 16/28*-1=-16/28 Bounds {-16/28,0}. Thus Oil is not compatible with causing war through SW.
