Annual Alliance Membership Data, 1815-1965 (ICPSR 5602)

Version Date: Feb 16, 1992 View help for published

Principal Investigator(s): View help for Principal Investigator(s)
David J. Singer; Melvin Small


Version V1

This data collection comprises one of four companion datasets produced by the Correlates of War Project at the University of Michigan. It consists of information on annual symmetric matrices of international alliance bonds for 157 nations in the period 1815-1965. For each alliance bond, data are coded for the type of alliance, such as defense, neutrality, or entente, according to explicit national commitments.

Singer, David J., and Small, Melvin. Annual Alliance Membership Data, 1815-1965. [distributor], 1992-02-16.

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1815 -- 1965
  1. See also the related collections, DIPLOMATIC MISSIONS RECEIVED BY EACH INTERNATIONAL SYSTEM MEMBER, 1817-1970 (ICPSR 5025), and DIPLOMATIC EXCHANGE DATA, 1815-1970 (ICPSR 5026).


A total of 157 alliance member nations in the period 1815-1965.



2018-02-15 The citation of this study may have changed due to the new version control system that has been implemented. The previous citation was:
  • Singer, David J., and Melvin Small. ANNUAL ALLIANCE MEMBERSHIP DATA, 1815-1965. ICPSR05602-v1. Ann Arbor, MI: University of Michigan Mental Health Institute, Correlates of War Project [producer], 196?. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 1991.


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