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IMI was begun by Frederic S. Pearson and Robert A. Baumann in late 1960s while both were at the University of Missouri-St. Louis.  Under their guidance, 667 cases of international military intervention spanning the years 1946 to 1988 were coded in IMI.  The data collection was deposited in the Inter-University Consortium of Political and Social Research (ICPSR) at the University of Michigan as collection 6035.   With the support of NSF award SES-0518294, Emizet N. Kisangani and Jeffrey Pickering of Kansas State University expanded the IMI collection to 2005, adding 449 cases.  The updated data is now housed in ICPSR collection 21282 as well as on this website.


ICPSR Codebook -
Kisangani & Pickering
1989-2005 Data

Word Document - 84K
ICPSR Data Description
Word Document - 31K
IMI Codebook - 1993
Word Document - 292K
IMI Pearson &
Baumann 1947-1988

Excel Spreadsh.- 224K
IMI Kisangani &
Pickering 1989-2005

Excel Spreadsh.- 168K
Merged IMI Data

Excel Spreadsh.- 317K

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