Liesbet Hooghe, W.R. Kenan, Jr. Distinguished Professor at UNC Chapel Hill and Chair in Multilevel Governance at the VU Amsterdam
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CHES trend 1999-2014

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, and 2014. The number of countries increased from 14 Western European countries in 1999 to 31 current, prospective, or associate EU members in 2014, and the number of national parties from 143 to 268. The 2014 survey includes parties in Norway, Switzerland, and Turkey as well as all EU members. Separate surveys were conducted in the Balkan candidate countries and in the Ukraine. Common to all surveys are questions on parties' general position on European integration, several EU policies, general left/right, economic left/right, and galtan; later surveys contain also questions on non-EU policy issues. The 2014 survey was extended to the United States, Canada and Mexico using somewhat different questions (see for updates).

With thanks to the European Union Center for Excellence, University of North Carolina in Chapel Hill, and the Chair for Multilevel Governance, at the VU University Amsterdam. This project has received funding from the European Union’s ERC Advanced Grant on Causes and Consequences of Multilevel Governance (No. 249543) and its Horizon 2020 research and innovation programme (No. 649281).

The dataset TREND FILE 1999-2014 (in STATA) joins up the 1999, 2002, 2006, 2010, and 2014 surveys. Since 2013 the official website for the CHES data is


Trend file 1999-2014 [recently revised -- April 1, 2016]

2014 Chapel Hill expert survey

2014 survey team: Ryan Bakker, Liesbet Hooghe, Seth Jolly, Gary Marks, Jonathan Polk, Jan Rovny, Marco Steenbergen, Milada Vachudova (with thanks to Jelle Koedam, Filip Kostelka, and Marko Zilovic for research assistance)

2010 Chapel Hill expert survey

2006 Chapel Hill expert survey

2002 Chapel Hill expert survey

1999 Chapel Hill expert survey


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We also conducted a mini-survey in 2007 in five candidate countries: Bosnia-Herzegovina, Croatia, Macedonia, Serbia, and Turkey.

2007 Candidate-countries survey

An earlier survey was conducted by Leonard Ray for 1984, 1988, 1992, and 1996. The combined dataset Ray-Marks-Steenbergen merges the 1999 Chapel Hill survey with the Ray dataset. The original variable names and party ids in the Ray data are relabeled to make them consistent with the Chapel Hill survey. Researchers can combine this dataset with the 2002, 2006, and 2010 data. The original Ray dataset is available on Ray's website.

Ray-Marks-Steenbergen survey

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