The MID3 Data Set, 1993—2001: Procedures, Coding Rules, and Description

Dealing with questions of war and peace and understanding the causes of interstate conflict is a primary goal of the field of international relations. In order to study interstate conflict in a rigorous manner, scholars have relied on established rules and procedures for gathering information into coherent data sets. Among those data sets is the Militarized Interstate Dispute (MID) data. In this paper we first outline the data-collection process for the MID3 data. Second, we introduce two new data sets emerging from the project, “MID-I” and “MID-IP.” Third, we present relatively small changes in coding rules for the new MID3 data and some descriptive statistics. The statistics indicate that the MID3 data are remarkably similar to the MID2.1 version, varying in some minor and predictable ways.