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Friday, June 01, 2007
A little more on the Peace Index
While gathering some data for another project I am working on I came across the domestic interest rates as reported in the International Financial Statistics series of the IMF. I was able to collect the interest rate data and match it up with the peace index. Unfortunately, there are countries in both series that are not included in the other. However, in the end I was able to match 80 countries with the 2007 peace index value and their 2006 domestic lending rate. One simple hypothesis would be that interest rates should be lower in more peaceful countries because uncertainty is lower, ceteris paribus. Therefore, if the peace index is measuring what it claims to measure, we should see a positive correlation between the peace index value (higher numbers are less peaceful countries) and interest rates. Here's a scatter plot of the data: There is a slight upward trend in the data (I note that I have dropped the extreme outlier of Zimbabwe which had an interest rate of 486%, the only country with lending rates over 100%). Here is the correlation between the two variables. The significance of the relationship is a bit weak (pvalue of 0.10), but it is nevertheless there. . pwcorr intrate06 peace07,sig For giggles, here's a simple regression model which relates the 2006 interest rate to the 2007 Peace Index and the 2005 interest rate: In this case, we find that the interest rates are negatively related to the peace index which doesn't make much sense. This makes me wonder what the peace index is measuring and whether the market views "peace" the same as the "peace index." If we include as many lagged values of the interest rate as possible (given the data I gathered), the relationship between the peace index and domestic lending rates is still negative only now insignificant:
I wonder if the problem is that many of the elements that comprise the peace index involve foreign (and sometimes distant) intervention and which could naturally mitigate the relationship between the peace index and interest rates. The intuition is that much of what makes the United States, for example, less peaceful (according to the Peace Index) happens thousands of miles away from the United States where the domestic lending rates are determined. In the absence of additional terrorism on the U.S. mainland, the actions in Afghanistan and Iraq, which influence the peace index, may have little to do with local lending rates in Iowa. Stata Data File
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