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December 4, 2018

Dear CSES User Community,

We are delighted to announce that a new product - the CSES Integrated Module Dataset (IMD) - is now available for download from the Data Center on the CSES website (

The IMD brings together select variables from CSES Modules 1-4 into one unified, harmonized dataset.

The current version of the IMD contains data on 281,083 respondents from 55 polities, covering 174 elections over the period 1996-2016. The dataset includes like-dislike, left-right, and leader measures for more than 600 parties.

Among other innovations, the IMD includes harmonized party/coalition codes within polities across CSES modules, within-dataset labels for all parties/coalitions, and an incumbent vote choice variable.

Many variables that will eventually be included in the IMD are not available in this first version of the dataset. As this is a work in progress, some errors may still be present. We would appreciate being notified of any errors or suggestions by email to:

The IMD is a product of the CSES Secretariat. Stephen Quinlan served as the overall manager of the development of the IMD and was supported in the effort by Katharina Blinzler, Christian Schimpf, Bojan Todosijevic, and Slaven Zivkovic.

We would like to specially thank Heiko Giebler, Josephine Lichteblau, Antonia May, Reinhold Melcher, Aiko Wagner, and Bernhard Weßels whose "CSES Module 1-3 Harmonized Trend File" was the first publicly available cumulative CSES dataset and served as inspiration for the IMD.

We hope that users will find this preliminary version of the CSES IMD helpful to their work.

Thank you for your support of the CSES!