Peace Science Society (International)


Interstate System, 1816-1997

This data set is a revised version of the state list periodically updated and distributed by the Correlates of War (COW) Project at the University of Michigan. This version extends the temporal domain of the collection to 1997 and dates system membership at the day level. This additional precision is intended to eliminate some inconsistencies with other data sets.

The most authoritative documentation for this data set is to be found in the following publications.

Melvin Small and J. David Singer (1982). Resort to Arms: International and Civil Wars, 1816-1980. Sage Publications, pp. 38-46.

J. David Singer and Melvin Small (1972). The Wages of War 1816-1965: A Statistical Handbook. John Wiley & Sons, pp. 19-30.

Bruce M. Russett, J. David Singer, and Melvin Small (1968). "National Political Units in the Twentieth Century: A Standardized List," American Political Science Review, 62(3):932-951.

The ZIP file that can be obtained below contains five files.

1

Readme.HTM - describes the content and format of the remaining files.

2

States.CSV - provides the entry and exit dates of states.

3

Majors.CSV - provides the entry and exit dates of major powers.

4

System.CSV - lists the composition of the state system year by year.

5

Dyads.CSV - lists the non-directional dyads in the state system year by year.

 

Click here to view Readme.HTM

Click here to receive data set.

 


Suggestions? Send email to Michael Arata at marata@psu.edu  
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Last Updated:2/10/2003 3:20:51 PM