Penn State Event Data

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The Penn State Event Data Project (formerly Kansas Event Data System) is a long term project aimed at collecting events among political actors. The events are extracted from regular news reports in a semi-automatic fashion. Specifically, we use data encoding events in or around the Persian Gulf region in the time from 1979 to 1999 available at under the link Gulf data coded from full stories. This data set consists of more than 304 thousand events; the first lines in the file look like this.

 790415	USA	SAU	042	ENDORSE     
 790415	EEC	UNK	031	MEET        
 790415	BEL	ZAR	032	VISIT       

The file encodes a tab-separated table whose rows have the following components (from left to right).

  • A 6-digit number encodes the time when the event happened, given by the day. For instance, the string 790415 refers to April 15, 1979.
  • The source actor is the one who initiates the event. This can be a country (e.g., SAU for Saudi Arabia), an organization (e.g., UNO), or - depending on the data set - even an individual person.
  • The target actor is the recipient of the event and is coded in the same way as the source.
  • The event type is a three-digit number giving the event code as defined in the World Event/Interaction Survey (WEIS) project. It specifies what happened in the event.
  • The last column is a textual description of the WEIS event type.

The WEIS event types have been mapped to a numerical cooperation/conflict scale (called Goldstein weights) where a positive event weight indicates a cooperative or friendly event and a negative weight indicates a conflictive or hostile event. The mapping from WEIS codes to Goldstein weights is available in the file

To make use of these event weights we have to merge them into the event table. This can be done with any software that supports to join tables; for instance with the R software for statistical computing (also see the tutorial on using the visone-R connection). The following code examples are for R. To load the event list into a table change first the R working directory with the setwd command to the folder where the event file is located. Then load the events into a data frame by. <- read.table("", header = TRUE, sep = "\t")