... University¹

Littauer Center North Yard, Cambridge Massachusetts 02138. Gary King: King@Harvard.Edu, http://GKing.Harvard.Edu, phone: (617) 495-2027; James Honaker: tercer@ucla.edu; Anne Joseph: ajoseph@fas.harvard.edu; Kenneth Scheve: kenneth.scheve@yale.edu, http://pantheon.yale.edu/~ks298. The program implements the procedures described in ``Analyzing Incomplete Political Science Data: An Alternative Algorithm for Multiple Imputation'' American Political Science Review Vol. 95 No. 1 (March, 2001):49-69, available at http://GKing.Harvard.Edu/. This document may be read on-line at the same web site. tex2html_wrap_inline$Amelia$ is named after that famous missing person and is written in the Gauss Programming Language, a trademark of Aptech Systems, Inc. Our thanks to David Baird for allowing us to use his superb DataLoad program for our Windows version. Amelia is copyrighted, but you may copy and distribute this program provided that no charge is made and the copy is identical to the original. To request an exception, please contact Gary King.

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... versions.²

Gauss is available for Windows, UNIX, and other operating systems from Aptech Systems, Inc.; 23804 S.E. Kent-Kangley Road; Maple Valley, Washington 98038; (206) 432-7855; FAX: (206) 432-7832; email: sales@aptech.com.

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... below³

Several transformations such as rescaling of the variables and rearrangement of the order of observations and variables to match patterns of missingness which are conducted by ${\mathfrak Amelia}$ for computational reasons are not shown in the example for descriptive ease. These transformations, just as those described, are also reversed before the imputed datasets are given to the user.

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