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

Published: Jan 18, 2006

Principal Investigator(s):
Charles McClelland

Version V3

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.

McClelland, Charles. World Event/Interaction Survey (WEIS) Project, 1966-1978. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2006-01-18.

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1966-01 -- 1978-12

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.

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


event/transaction data



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.


  • Data in this collection are available only to users at ICPSR member institutions.

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