This study is provided by ICPSR. ICPSR provides leadership and training in data access, curation, and methods of analysis for a diverse and expanding social science research community.

Dyadic Disputes, 1920-1968 (ICPSR 5401)

Principal Investigator(s): Coplin, William, Syracuse University. Maxwell School of Citizenship and Public Affairs; Rochester, J. Martin, Syracuse University. Maxwell School of Citizenship and Public Affairs


This study is an exploration of 121 dyadic disputes that occurred among 71 nations in the period 1920-1968 and were considered in at least one of four major international institutions: the Permanent Court of International Justice (PCIJ), the International Court of Justice (ICJ), the League of Nations, and the United Nations (UN). The data were collected to provide systematic and comparative analyses of these four international institutions in the international bargaining process. The two basic units of analysis used in this study are participants (nations) and cases. The participants data are further divided into national attributes of participants and patterns of institutional usage by participants. The case-unit data are divided into case attributes and attributes of the dyadic relationship between the two participants in each case. The Attributes of Participants File (Part 1) contains information on the date of each nation's independence, date when the case was introduced to the institution and how the case was introduced, date when the nation's current regime came to power, type of political systems, stage of nation's economic development, socio-cultural regions, geographical regions, and the degree of the nation's institutional usage. The Participant Usage File (Part 2) includes data on the total number of cases in which the nation participated, jointly submitted the dispute, or was the applicant, and each nation's total weighted index of participation in the four major international institutions. The Dyadic Relationships File (Part 3) includes data on the types of issues involved in each case, hostilities associated with the case, institutions credited with stopping hostilities, collective mediation and conciliation, truce enforcement, relative power capabilities of the disputants, and military and geographical distance between disputants, as well as comparisons of economic stages of development, socio-cultural and geographical regions, and institutional usages between the disputants.

Access Notes

  • Data in this collection are available only to users at ICPSR member institutions. Please log in so we can determine if you are with a member institution and have access to these data files.


DS0:  Study-Level Files
DS1:  Attributes of Participants - Download All Files (2.419 MB)
ASCII + SAS Setup    SPSS Setup   
DS2:  Participant Usage - Download All Files (2.425 MB)
ASCII + SAS Setup    SPSS Setup   
DS3:  Dyadic Relationships - Download All Files (2.427 MB)
ASCII + SAS Setup    SPSS Setup   

Study Description


Coplin, William, and J. Martin Rochester. Dyadic Disputes, 1920-1968. ICPSR05401-v2. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 1999. https://doi.org/10.3886/ICPSR05401.v2

Persistent URL: https://doi.org/10.3886/ICPSR05401.v2

Export Citation:

  • RIS (generic format for RefWorks, EndNote, etc.)
  • EndNote XML (EndNote X4.0.1 or higher)


This study was funded by:

  • Wayne State University
  • Syracuse University
  • University of Michigan

Scope of Study

Subject Terms:    conflict, conflict resolution, hostility, International Court of Justice, international organizations, international relations, mediation, nations, Permanent Court of International Justice, United Nations

Geographic Coverage:    Global

Time Period:   

  • 1920--1968

Universe:    A total of 121 dyadic disputes among 71 nations in the Permanent Court of International Justice, the International Court of Justice, the League of Nations, and the United Nations, in the period 1920-1968.

Data Type(s):    event/transaction data, and aggregate data


Data Source:

(1) JOURNAL OF THE LEAGUE OF NATIONS, 1920-1940 (2) UNITED NATIONS BULLETIN, 1946-1954, (3) UNITED NATIONS REVIEW, 1954-1964, (4) UNITED NATIONS MONTHLY CHRONICLE, 1965-1968, (5) Russett, Bruce M. J. David Singer, and Melvin Small. "National Political Units in the Twentieth Century: A Standardized List." AMERICAN POLITICAL SCIENCE REVIEW 62,3 (1968), 935-950, (6) THE STATESMAN'S YEARBOOK, 1925-1966, (7) Hudson, Manley O. WORLD COURT REPORTS, 1935-1943, (8) INTERNATIONAL COURT OF JUSTICE REPORTS, 1946-1964, (9) Myers, Denys P. HANDBOOK OF THE LEAGUE OF NATIONS. New York, NY: World Peace Foundation, 1935, (10) Walter, F.P. A HISTORY OF THE LEAGUE OF NATIONS. New York, NY: Oxford University Press, 1960, (11) Wright, Quincy. A STUDY OF WAR. Chicago, IL: University of Chicago Press, 1965, (12) Wright, Quincy. SYNOPSES OF UNITED NATIONS CASES IN THE FIELD OF PEACE AND SECURITY 1946-1965. New York, NY: Carnegie Endownment for International Peace, 1966, (13) Haas, Ernst B. COLLECTIVE SECURITY AND THE FUTURE INTERNATIONAL SYSTEM. Denver, CO: University of Denver, 1968, and (14) Singer, J. David, and Melvin Small. "Formal Alliances: A Quantitative Description." JOURNAL OF PEACE RESEARCH 1 (1966), 1-32.


Original ICPSR Release:   1984-05-03

Version History:

  • 2006-01-12 All files were removed from dataset 4 and flagged as study-level files, so that they will accompany all downloads.

Related Publications



Metadata Exports

If you're looking for collection-level metadata rather than an individual metadata record, please visit our Metadata Records page.

Download Statistics