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CHES Interactive

For more information on the variables or full party names, download the CHES codebook. Please note that the endpoints of the scales are clearly labeled in the codebook. To download the graphs, use the Plotly button or right-click and save image.

Bar Graph

Choose country

Choose year

Choose variable

Scatterplot in one country

Choose country

Choose year

Choose X-axis variable

Choose Y-axis variable

Show party label. If not, then hover over marker for more information.

Scatterplot in all countries

Choose year

Choose X-axis variable

Choose Y-axis variable

Change over time in one country

Choose country

Choose first year

Show intermediate year (3-point path)

Choose last year

Choose X-axis variable

Choose Y-axis variable


                This Shiny application was designed by 
                Seth Jolly

CHES Interactive

Chapel Hill Expert Survey (CHES)

The Chapel Hill expert surveys estimate party positioning on European integration, ideology and policy issues for national parties in a variety of European countries. The first survey was conducted in 1999, with subsequent waves in 2002, 2006, 2010, 2014, 2019, 2024. The number of countries increased from 14 Western European countries in 1999 to 24 current or prospective EU members in 2006 to 31 countries in 2024. In this time, the number of national parties grew from 143 to 279. Questions on parties' general position on European integration, several EU policies, general left/right, economic left/right, and social left/right are common to all surveys. More recent surveys also contain questions on non-EU policy issues, such as anti-elite rhetoric, immigration, redistribution, decentralization, and environmental policy.

You can download the data at chesdata.eu/ches-europe.

When using the 1999-2024 trend file, cite the following:

Rovny, Jan, Ryan Bakker, Liesbet Hooghe, Seth Jolly, Gary Marks, Jonathan Polk, Jan Rovny, Marco Steenbergen, and Milada Anna Vachudova. 2025. “The 2024 Chapel Hill Expert Survey on political party positioning in Europe: Twenty-five years of party positional data.” Electoral Studies 97 (October). https://doi.org/10.1016/j.electstud.2025.102981

If you have any questions about CHES interactive or suggestions, contact us.