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World Event/Interaction Survey (WEIS) Project, 1966-1978 (ICPSR 5211)

Principal Investigator(s): McClelland, Charles


The WEIS Project dataset is a record of the flow of action and response between countries (as well as non-governmental actors, e.g., NATO) reflected in public events reported daily in the New York Times from January 1966 through December 1978. The WEIS Project began under the direction of Charles McClelland at the University of Southern California as a research project on international system characteristics and processes. The unit of analysis in the dataset is the event/interaction, referring to words and deeds communicated between nations, such as threats of military force. Each event/interaction is a daily report of an international event. There are 98,043 events included in this dataset. Coded for each event are the actor, target, date, action category, and arena. Also provided are brief textual descriptions for each event.

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:  Analytic and Descriptive - Download All Files (35.638 MB)
ASCII + SAS Setup    SPSS Setup   
DS2:  Analytic - Download All Files (4.04 MB)
ASCII + SAS Setup    SPSS Setup   
DS3:  Codebook for All Parts
No downloadable data files available.

Study Description


McClelland, Charles. World Event/Interaction Survey (WEIS) Project, 1966-1978. ICPSR05211-v3. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 1999. https://doi.org/10.3886/ICPSR05211.v3

Persistent URL: https://doi.org/10.3886/ICPSR05211.v3

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Scope of Study

Subject Terms:    Arab Israeli conflict, Arab Israeli relations, diplomacy, foreign affairs, international conflict, international cooperation, international organizations, kidnapping, nations, NATO, South East Asia Treaty Organization, Strategic Arms Limitation Talks, terrorism, Vietnam War, Warsaw Pact, world politics

Geographic Coverage:    Africa, Asia, Berlin, Cambodia, China (Peoples Republic), Cyprus, Czechoslovakia, Dominican Republic, Europe, France, Germany, Global, India, Indonesia, Malaysia, Middle East, Nigeria, North Korea, Pakistan, South Korea, Southeast Asia, Soviet Union, United States, Vietnam (Socialist Republic), West Indies, Yemen, Zimbabwe

Time Period:   

  • 1966-01--1978-12

Universe:    Public events involving two or more countries and/or international organizations reported daily in The New York Times from January 1966 through December 1978.

Data Type(s):    event/transaction data

Data Collection Notes:

Consolidated Analysis Centers, Inc., provided the data for September 1969-June 1975. However, the textual data are not complete. ICPSR does not have textual data for the period September-December 1969.


Data Source:



Original ICPSR Release:   1984-05-03

Version History:

  • 2006-01-18 File CB5211 was removed from any previous datasets and flagged as a study-level file, so that it will accompany all downloads.
  • 2006-01-12 All files were removed from dataset 3 and flagged as study-level files, so that they will accompany all downloads.

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