Data Set Numbers
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35,000 historical sources -
1,900 confrontations -
30,000 event observations
A convention that has developed over the last couple of decades has quantitative researchers sampling only the Correlates of War Militarized Interstate Disputes (CoWMIDs) that had military fatalities. Most recognize the heterogeneity in the data set—that there are some “weird” cases—and want to analyze only those cases that truly have a chance to escalate to war. We have found this selection method to be both theoretically and empirically fraught. Here’s why.