Introduction
An important responsibility of researchers is the distribution of data and other research materials to the scholarly community at large. When researchers distribute their data, other scholars can either replicate their work or address additional research questions not studied by the original data collectors. In short, the entire scholarly community benefits.
This page is the data archive for the Issue Correlates of War (ICOW) Project, as well as for non-ICOW data sets that have been collected by Paul Hensel. More information about the ICOW Project, about each ICOW data set on this page, and about Dr. Hensel's research agenda is available on the ICOW page and research page, elsewhere on this web site.
Once available, these data sets may be downloaded freely, with several requested restrictions:
- First, I ask that copies of ICOW data not be distributed to third parties; instead, every user should be directed to this web site to download the latest officially released version of the data. If any updates or extensions are added to the data, I would prefer that all new users download the latest version rather than receive outdated copies of the data from other users. (It would also be desirable for current users of ICOW data to check this web site occasionally to see if newer versions of the data have been released).
- Second, I ask that any users of the ICOW data examine it for potential errors or missing cases; the scholarly community benefits greatly when scholars do not mindlessly use new data sets (and when they pass along any potential problems with the data, rather than ignoring them and complaining about data quality).
- Finally, I ask that scholars send the project director a copy of any research that uses ICOW data as a professional courtesy. Any users of the ICOW data are also encouraged to email the project director with any comments or feedback on the project or its data sets.
ICOW Issue Data Sets
Combined Downloads
- ICOW Data version 1.1 This is the official release version of the ICOW territorial claims, river claims, and maritime claims data sets, available in .zip archive format. This release covers territorial claims in the Western Hemisphere and Western Europe (1816=2001); river claims in Weestern Hemisphere, Western Europe, and the Middle East (1900-2001); and maritime claims in the Western Hemisphere and Europe (1900-2001).
Territorial Claims
- The territorial claims data set is described on the ICOW home page.
- The latest version of the territorial claims codebook is available (in PDF format); see also the general ICOW codebook.
- Data on territorial claims in the Western Hemisphere, 1816-2001, is available in the official release of the combined ICOW data, described above.
- The 2001 ISQ article data set on territorial claims in the Americas may be downloaded in .zip archive format, although the official release of the combined ICOW data (described above) covers a longer time frame and includes a number of new cases and revised cases since the ISQ version came out.
River Claims
- The river claims data set is introduced on the ICOW home page.
- The latest version of the river claims codebook is available (in PDF format); see also the general ICOW codebook.
- Data on river claims in the Western Hemisphere, 1900-2001, is available in the official release of the combined ICOW data, described above.
Maritime Claims
- The maritime claims data set is introduced on the ICOW home page.
- The latest version of the codebook will be available soon (in PDF format); see also the general ICOW codebook.
- Data on maritime claims in the Western Hemisphere, 1900-2001, is available in the official release of the combined ICOW data, described above.
Regime Claims
- The regime claims data set is introduced on the ICOW home page.
- The data set is currently being collected and cleaned, and will be made available upon completion. Initial work on this data set was used by John Tures in his Spring 2000 Ph.D. dissertation, which focused on regime claims in the Western Hemisphere, and will be completed and extended to the remainder of the world as time allows.
- The latest version of the regime claims codebook is available (in PDF format).
- The latest list of Western Hemisphere regime claims used in John Tures' dissertation (and recently extended through 2002) may be downloaded (in .zip archive format. The full regime claims data set -- including data on claim salience and perhaps on the occurrence of peaceful settlement attempts in these claims, as well as control variables -- will be made available on this web site at a later date by John.
ICOW Supplementary Data Sets
Non-State Actor Codes
- The ICOW project has produced a list of actor codes for non-state actors not appearing in the standard COW interstate system membership list; this list is available in PDF format.
- Last revised: 5 July 2000.
Historical State Names
- The historical state names data set is introduced on the ICOW home page.
- ICOW Historical State Names Data: An Adobe Acrobat (PDF) document listing alternative names for nation-states in the COW interstate system, including traditional names, alternate spellings of common names, foreign spellings, and some colonial-era names. This data set is important for scholars attempting to code historical data, as many older source materials use country names that are no longer used or understood, meaning that coders might ignore or mis-code data.
- Current Version: 0.4 (last revised Summer 2006)
Multilateral Treaties of Pacific Settlement (MTOPS)
- The MTOPS data set is introduced on the ICOW home page.
- ICOW International Organizations Membership Data: A compilation of membership in regional or global organizations that call explicitly for the peaceful settlement of disputes among their members. This currently includes over thirty multilateral treaties and organizations, ranging from the League, UN, and International Court of Justice to a number of relatively obscure South American treaties from the 1920s and 1930s. This data set is compressed in ZIP format and includes both the data set (in treaty-level, state-year-level, and dyad-year-level Stata data files) and the codebook and documentation; the codebook, documentation of included cases, and notes about excluded cases are also available separately in PDF format.
- Current Version: 1.4 (last revised 31 July 2006)
Colonial History
- The colonial history data set is introduced on the ICOW home page.
- ICOW Colonial History Data: A compilation of each COW system member's history of colonial rule and similar experiences, including the dates and processes of independence. This data set is available in an Excel spreadsheet and a .CSV comma-delimited file, with documentation in an RTF word processing file; the entire folder is compressed in ZIP format.
- Current Version: 0.4 (last revised June 2006)
Non-ICOW Data Sets
Hensel and Diehl Shatterbelt Data, 1945-1976
- Shatterbelt Data: State-level data on the shatterbelt status of geographic regions, as used in Hensel and Diehl's 1994 Political Geography article. This data set is compressed in ZIP format and is provided in .CSV comma-delimited format, along with a brief codebook.
- Current Version: 1.1 (last revised 27 March 2000)
Replication Data from Recent Publications
2000 Hensel, Goertz, and Diehl JOP Article (Democracy and Rivalries)
- Rivalries and democracy data: Data on democracy and rivalries from the 2000 JOP article by Hensel, Goertz, and Diehl These files are compressed in ZIP format and include data files (provided in .CSV comma-delimited format), SAS command files to read in the data and run the necessary analyses, and a brief codebook.
2001 Hensel ISQ Article (Territorial Claims in the Americas)
- Western Hemisphere territorial claims data: Data on the management of territorial claims from the 2001 ISQ article by Paul Hensel. These files are compressed in ZIP format and include data files (provided in .CSV comma-delimited format), Stata command files to read in the data and run the necessary analyses, and a brief codebook.
Research-Related Computer Programs
Statistical Programs Using Microsoft Excel
- Table2x2.xls: An Excel program that allows the user to calculate statistics from a 2x2 contingency table (requires that the user fill in the four cells in the table, and then provides several dozen statistics for the table: several chi-square statistics, the odds ratio, Yule's Q, and many others)
- Logit.xls: An Excel program that allows the user to calculate expected values from a logistic regression model (requires that the user input the model coefficients and means, modes, or other meaningful values, and then returns the overall expected values for the model as well as changes in the expected values when moving from one value of each variable to another)
http://garnet.acns.fsu.edu/~phensel/icowdata.html (or http://data.icow.org)
Last updated: 4 June 2007
This site © copyright 1996-present,
Paul R. Hensel. All rights reserved.